Revert "Produce less broken basic block sequences for __finally blocks."

The test is broken on buildbots:
http://lab.llvm.org:8080/green/job/clang-stage2-configure-Rlto_check/2279/

This reverts commit adda738b6dc533c42db5f5f5b31344098a3aba7d.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@230472 91177308-0d34-0410-b5e6-96231b3b80d8