include stdint.h for int32_t/uint32_t

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
diff --git a/libweston/launcher-util.c b/libweston/launcher-util.c
index 03b9d63..4abd1e2 100644
--- a/libweston/launcher-util.c
+++ b/libweston/launcher-util.c
@@ -31,6 +31,7 @@
 #include "launcher-util.h"
 #include "launcher-impl.h"
 
+#include <stdint.h>
 #include <unistd.h>
 #include <linux/input.h>