Remove redundant #include path component.

Using the parent '../' path component in #include statements makes
the codebase more rigid and is redundant due to proper -I use.

Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
diff --git a/clients/screenshot.c b/clients/screenshot.c
index 040a438..f11e3ba 100644
--- a/clients/screenshot.c
+++ b/clients/screenshot.c
@@ -37,7 +37,7 @@
 
 #include <wayland-client.h>
 #include "screenshooter-client-protocol.h"
-#include "../shared/os-compatibility.h"
+#include "shared/os-compatibility.h"
 
 /* The screenshooter is a good example of a custom object exposed by
  * the compositor and serves as a test bed for implementing client