[Sanitizer] Use same PC threshold in slow unwinder on all platforms

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@194580 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Remove the stale dependency on the Foundation framework from the dynamic ASan runtime.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@194583 91177308-0d34-0410-b5e6-96231b3b80d8