[Sanitizer] support running external llvm-symbolizer on Mac

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@183730 91177308-0d34-0410-b5e6-96231b3b80d8
[Sanitizer] add file forgotten in r183730

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@183732 91177308-0d34-0410-b5e6-96231b3b80d8
[lsan] Fix the unittest makefiles.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@183735 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: add -Wno-maybe-uninitialized to Go build script
this is how the rest of the codebase is built


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@183738 91177308-0d34-0410-b5e6-96231b3b80d8
[lsan] Harmonized some naming inconsistencies.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@183748 91177308-0d34-0410-b5e6-96231b3b80d8