maintcheck: avoid yet more spurious failures (2) Some maintainer checks were too greedy in processing 'Makefile.am' files, looking for them even in temporary directories left behind by the test cases, thus causing occasional spurious failures. * syntax-checks.mk (ams): Ignore 'Makefile.am' files in the temporary test directories. Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>