[asan] Fix compiler warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208769 91177308-0d34-0410-b5e6-96231b3b80d8
Regression test for ARM EHABI breakage in r208166.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208770 91177308-0d34-0410-b5e6-96231b3b80d8