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/src/input.c b/src/input.c
index e2d33d6..65d2d09 100644
--- a/src/input.c
+++ b/src/input.c
@@ -34,7 +34,7 @@
 #include <fcntl.h>
 #include <limits.h>
 
-#include "../shared/os-compatibility.h"
+#include "shared/os-compatibility.h"
 #include "compositor.h"
 
 static void