tests: Update .gitignore for test-int128 and test-bitops

tests: Update .gitignore for test-int128 and test-bitops

Forgotten in commit 6046c62 and 3464700.

Cc: qemu-stable@nongnu.org
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(cherry picked from commit 9dbb52e862458935c250bac9e71d5a87da4e33e9)

Conflicts:

	tests/.gitignore

*removed post-1.6 additions from diff

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>