[update_llc_test_checks][VE] Handle .Lfoo$local in function regex

While working on https://reviews.llvm.org/D131429, I got a test diff in
one of the VE tests and running update_llc_test_checks.py deleted all the
code for that function. This updates the regex to handle this new output.

Reviewed By: kaz7

Differential Revision: https://reviews.llvm.org/D131431