Include all include files in dist tarballs
Otherwise, the distribution tarballs will be generated based on what's in libevdev_la_SOURCES, which only includes the headers for the operating system the maintainer happens to be running "make dist" from. As a result of this, e.g. the 1.13.0 tarball only includes the headers for Linux, making the tarball unbuildable for FreeBSD.
"meson dist" was already doing the right thing.
Signed-off-by: Alyssa Ross hi@alyssa.is