A fix for sanitizers' TLS support on FreeBSD

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@204595 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a VS compile-time warning

warning C4345: behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@204597 91177308-0d34-0410-b5e6-96231b3b80d8