Revert "[libcxxabi] When built with ASan, __cxa_throw calls __asan_handle_no_return"
Revert "[libcxxabi] When built with ASan, __cxa_throw calls __asan_handle_no_return"

This reverts commit r312606 because it's causing an error on
libcxx-libcxxabi-x86_64-linux-ubuntu-asan bot.

git-svn-id: 6a9f6578bdee8d959f0ed58970538b4ab6004734@312609 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi