[sanitizer] Fix kernel headers compatibility on powerpc64.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@195442 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Fix large_allocator_unpoisons_on_free.cc to pass correct parameters to mmap() on OSX.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@195443 91177308-0d34-0410-b5e6-96231b3b80d8