Exclude more build files from rsync between tests.
Exclude more build files from rsync between tests.

Files (especially build.auto.h) were being removed and forcing a full build between separate invocations of test.pl.

This affected ad-hoc testing at the command-line, not a full test run in CI.

pgbackrest/pgbackrest,pgmasters/backrest,pgmasters/backrest,pgbackrest/pgbackrest,pgbackrest/pgbackrest