[dsymutil] Suppress CoreFoundation leaks in tests.

This suppresses CoreFoundation originated leaks in the dsymutil tests.
I'm not sure if this is a false positive or not, but either way we don't
have control over it and shouldn't keep the bot red.

http://lab.llvm.org:8080/green/job/clang-stage2-cmake-RgSan/

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@342724 91177308-0d34-0410-b5e6-96231b3b80d8

test/tools/dsymutil/X86/lit.local.cfg

@@ -1,4 +1,10 @@
+import os
+
 if not 'X86' in config.root.targets:
     config.unsupported = True
 
+if "Leaks" in config.llvm_use_sanitizer:
+    suppr = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'suppressions.txt')
+    config.environment['LSAN_OPTIONS'] = 'suppressions={}'.format(suppr)
+
 config.suffixes = ['.test', '.cpp', '.m', '.s']

test/tools/dsymutil/X86/suppressions.txt

@@ -0,0 +1,2 @@
+# Ignore leaks in CoreFoundation.
+leak:CF