tests: install drmdevice

Just like the other tests (tools really) install drmdevice. It is a
simple tool which is useful for basic check/testing.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Eric Engestrom <eric@engestrom.ch>

tests/meson.build

@@ -70,6 +70,7 @@ drmdevice = executable(
   include_directories : [inc_root, inc_drm],
   link_with : libdrm,
   c_args : libdrm_c_args,
+  install : with_install_tests,
 )
 
 test('hash', hash)