[Msan] Check returning value of DTLS_Get()
Differential Revision: http://reviews.llvm.org/D6403


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@222818 91177308-0d34-0410-b5e6-96231b3b80d8
[Msan] Exclude non-FreeBSD interceptors on FreeBSD
Differential Revision: http://reviews.llvm.org/D6404


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@222822 91177308-0d34-0410-b5e6-96231b3b80d8