configure.ac: Add subdir-objects to AM_INIT_AUTOMAKE paramaters

Silences a warning when running autogen.sh.

This also adds a work-around for a bug in automake
<https://lists.gnu.org/archive/html/bug-automake/2014-01/msg00005.html>
replacing $(top_srcdir) with ../ in test/Makefile.am.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
event-debug: Silence compiler warnings

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
tools/event-gui: Silence a couple of compiler warnings

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
test: Assert libevdev_uinput_write_event() call was successful

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Include stdint.h from filter.h

Don't rely on the users to include it

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>