Fix libunwind putting libraries into lib64 on ppc64le

LibUnwind/build_tarballs.jl

@@ -16,8 +16,9 @@ cd $WORKSPACE/srcdir/libunwind*/
 
 atomic_patch -p1 ${WORKSPACE}/srcdir/patches/libunwind-prefer-extbl.patch
 atomic_patch -p1 ${WORKSPACE}/srcdir/patches/libunwind-static-arm.patch
+atomic_patch -p1 ${WORKSPACE}/srcdir/patches/libunwind-configure-ppc64le.patch
 
-./configure --prefix=$prefix --host=$target CFLAGS="${CFLAGS} -fPIC"
+./configure --prefix=$prefix --host=$target CFLAGS="${CFLAGS} -fPIC" --libdir=${prefix}/lib
 make -j${nproc}
 make install
 """

LibUnwind/bundled/patches/libunwind-configure-ppc64le.patch

@@ -0,0 +1,15 @@
+--- a/configure	2019-03-26 03:46:55.540423566 -0400
++++ b/configure	2019-03-26 03:47:11.765002029 -0400
+@@ -17182,12 +17182,6 @@
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $use_dwarf" >&5
+ $as_echo "$use_dwarf" >&6; }
+
+-if test x$target_arch = xppc64; then
+-        libdir='${exec_prefix}/lib64'
+-        { $as_echo "$as_me:${as_lineno-$LINENO}: PowerPC64 detected, lib will be installed ${libdir}" >&5
+-$as_echo "$as_me: PowerPC64 detected, lib will be installed ${libdir}" >&6;};
+-
+-fi
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to restrict build to remote support" >&5
+ $as_echo_n "checking whether to restrict build to remote support... " >&6; }