lirc: Make X support to be a packageconfig

When we dont have x11 in distro features it fails to build
since libx11 dependency is not satisfied

Change-Id: I6774a83f965551a41afe12b1304e44e73fc789c0
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>