[sanitizer] Fix OSX build.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@193244 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] ASan can be combined with LSan and UBSan, so export symbol from them as well.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@193245 91177308-0d34-0410-b5e6-96231b3b80d8