drm_hwcomposer: Fix up #include ordering

Change-Id: I9d808389c60b9d77c8e03a09aeaf3f309353cde8
Signed-off-by: Sean Paul <seanpaul@chromium.org>
diff --git a/hwcomposer.cpp b/hwcomposer.cpp
index b91323f..6f55fc6 100644
--- a/hwcomposer.cpp
+++ b/hwcomposer.cpp
@@ -21,13 +21,11 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <list>
 #include <pthread.h>
 #include <stdlib.h>
 #include <sys/param.h>
 #include <sys/resource.h>
-
-#include <list>
-
 #include <xf86drm.h>
 #include <xf86drmMode.h>