gdb: internal_error -> internal_error_loc in gdb-gdb.gdb.in
Commit f34652de0b ("internal_error: remove need to pass
__FILE__/__LINE__") renamed the internal_error function to
internal_error_loc. Change gdb-gdb.gdb.in accordingly.
Change-Id: I876e1623607b6becf74ade53d102ead53a74ed86