Fix GVN to handle normal paths leading to catch entry.

When the catch block is empty, the catch entry is actually
the normal path block after the try block. Fix the LVN
merge for catch entries that didn't expect it during GVN.

Bug: 16360024
Change-Id: I9adfc3445245d3fa3c4809d4df1b7b76fbef5ff2
2 files changed