[Tsan] Fix sigaction_t to match system definition on FreeBSD
Differential Revision: http://reviews.llvm.org/D5856


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@220291 91177308-0d34-0410-b5e6-96231b3b80d8
[Tsan] Add FreeBSD support to longjmp-related definitions
Differential Revision: http://reviews.llvm.org/D5857


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@220292 91177308-0d34-0410-b5e6-96231b3b80d8