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/presentation-shm.c b/clients/presentation-shm.c
index 5fb1f08..e81f5f4 100644
--- a/clients/presentation-shm.c
+++ b/clients/presentation-shm.c
@@ -36,7 +36,7 @@
 #include <time.h>
 
 #include <wayland-client.h>
-#include "../shared/os-compatibility.h"
+#include "shared/os-compatibility.h"
 #include "presentation_timing-client-protocol.h"
 
 #define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])