[msan] Fix fcvt interceptor.

fcvt() result can be heap-allocated and must be unpoisoned.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@215106 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Intercept timerfd_settime, timerfd_gettime.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@215112 91177308-0d34-0410-b5e6-96231b3b80d8
Support getting process maps for sanitizers needs on FreeBSD in 32-bit mode
Differential Revision: http://reviews.llvm.org/D4807


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@215185 91177308-0d34-0410-b5e6-96231b3b80d8