configure.ac: don't detect disabled options dependencies

Currently with --disable-amdgpu --disable-valgrind --disable-cairo-tests
cunit, valgrind and cairo are still detected.

Signed-off-by: Marcin Ślusarz <marcin.slusarz@gmail.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
1 file changed