Live-in copies go *after* EH_LABELs.

This will soon be tested by exception handling working at all.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185615 91177308-0d34-0410-b5e6-96231b3b80d8
FastISel can only apend to basic blocks.

Compute the insertion point from the end of the basic block instead of
skipping labels from the front.

This caused failures in landing pads when live-in copies where inserted
before instruction selection.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185616 91177308-0d34-0410-b5e6-96231b3b80d8