Makefile.am: Make check depend on all

Doing ./configure && make check is perfectly valid, lets make sure it
works, by making check depend on all.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
gitignore: Ignore /t/tmp*

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>