[Sanitizer] include stddef.h for ptrdiff_t in interception type test

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174597 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Exclude off64_t test on mac.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174598 91177308-0d34-0410-b5e6-96231b3b80d8
[tsan] race_on_write test

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174599 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] OFF_T on Mac is u64.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174600 91177308-0d34-0410-b5e6-96231b3b80d8