[tsan] fix thread_name.cc test to work with older versions of libc

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@173023 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Define va_copy on win32.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@173025 91177308-0d34-0410-b5e6-96231b3b80d8
Fixup for r173021: build tests with zero-based shadow on Android only, fix condition in checking for shadow gap in asan_mapping.h

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@173026 91177308-0d34-0410-b5e6-96231b3b80d8