Some of the tables in debug_line_malformed.s were not being checked in the NONFATAL checks in debug_line_invalid.test (only the warnings coming from them were being checked). This made the test harder to follow. Additionally, a later change will change the way the errors are handled such that more of the line table will be printed. That will require checks for these tables (or something equivalent) so that the difference in behaviour can be observed. This patch adds checks for the three tables that were missing checks.
Depends on D71752.