Build LLVM with -static-libstdc++ on dist builds

[alexcrichton]

This commit is intended on fixing a regression from #57286 where the
distributed LLVM shared library unfortunately depends on a dynamic copy
of libstdc++, meaning we're no longer as binary compatible as we
thought! This tweaks the build of LLVM as out distribution is slightly
different now, and is hoped to fix the issue.

Closes #57426

[rust-highfive]

r? @nikomatsakis

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[Mark-Simulacrum]

@bors r+ p=1 (unbreaks nightly for some distros)

[bors]

📌 Commit 444bc74 has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit 444bc74 with merge 94b991d...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-x86_64-netbsd of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[01:26:53] [ 55%] Built target LLVMAsmPrinter
[01:26:53] Scanning dependencies of target LLVMHello
[01:26:53] [ 55%] Building CXX object lib/Transforms/Hello/CMakeFiles/LLVMHello.dir/Hello.cpp.o
[01:26:55] [ 55%] Linking CXX shared module ../../LLVMHello.so
[01:26:55] /x-tools/x86_64-unknown-netbsd/lib/gcc/x86_64--netbsd/4.8.4/../../../../x86_64--netbsd/bin/ld: /x-tools/x86_64-unknown-netbsd/sysroot/usr/lib/libstdc++.a(new_op.o): relocation R_X86_64_32S against `_ZTVSt9bad_alloc' can not be used when making a shared object; recompile with -fPIC
[01:26:55] /x-tools/x86_64-unknown-netbsd/sysroot/usr/lib/libstdc++.a: could not read symbols: Bad value
[01:26:55] collect2: error: ld returned 1 exit status
[01:26:55] make[2]: *** [lib/LLVMHello.so] Error 1
[01:26:55] make[1]: *** [lib/Transforms/Hello/CMakeFiles/LLVMHello.dir/all] Error 2
[01:26:55] make[1]: *** Waiting for unfinished jobs....
[01:26:56] [ 55%] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineFunctionPass.cpp.o
[01:26:57] [ 55%] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineFunctionPrinterPass.cpp.o
[01:27:00] [ 55%] Linking CXX static library ../../libLLVMInstCombine.a
[01:27:00] [ 55%] Built target LLVMInstCombine
---
[01:29:41] [ 59%] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/WinEHPrepare.cpp.o
[01:29:42] [ 59%] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/XRayInstrumentation.cpp.o
[01:29:48] [ 59%] Linking CXX static library ../libLLVMCodeGen.a
[01:29:48] [ 59%] Built target LLVMCodeGen
[01:29:48] make: *** [all] Error 2
[01:29:48] command did not execute successfully, got: exit code: 2
[01:29:48] 
[01:29:48] 
[01:29:48] build script failed, must exit now', /cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/cmake-0.1.33/src/lib.rs:773:5
[01:29:48]  finished in 1520.231
[01:29:48] travis_fold:end:llvm

[01:29:48] travis_time:end:llvm:start=1546903849849886532,finish=1546905370081854541,duration=1520231968009
---
travis_time:end:194365f8:start=1546905371507795050,finish=1546905371529050933,duration=21255883
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:01a52eec
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:00f33ed0
travis_time:start:00f33ed0
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:08baf514
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[alexcrichton]

@bors: r=Mark-Simulacrum

[bors]

📌 Commit d585553 has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit d585553 with merge b221347a94ca53788edded0f2db902bd1d7c3d81...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-i686-apple of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[kennytm]

@bors retry

3 hour timeout, probably due to cache invalidation.

[bors]

⌛ Testing commit d585553 with merge 2cb7cdc...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: Mark-Simulacrum
Pushing 2cb7cdc to master...