[sanitizer] Intercept strerror and strerror_r.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@187978 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: better  diagnostics for invalid addresses passed to free()


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@187980 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Intercept scandir/scandir64.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@187982 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Limit scandir interceptor to Linux.

Implementation uses __thread not available on certain platforms.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@187983 91177308-0d34-0410-b5e6-96231b3b80d8