libweston: do not include config-parser.h

config-parser.h is a helper API that libweston core must never depend on. Using
it is a compositor frontend decision.

Including it in libweston.h would give the wrong message.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

compositor/weston.h

@@ -31,6 +31,7 @@ extern "C" {
 #endif
 
 #include <libweston/libweston.h>
+#include <libweston/config-parser.h>
 
 void
 screenshooter_create(struct weston_compositor *ec);