[msan] Unpoison the result of posix_memalign.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@180101 91177308-0d34-0410-b5e6-96231b3b80d8
[MSan] Make a few interface functions accept 'const void *' instead of 'void*'

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@180102 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Disable strict-init-order checker once we have more than one thread, as this mode is thread-hostile

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@180106 91177308-0d34-0410-b5e6-96231b3b80d8