xf86-video-armsoc: pick up an upstream patch.

This CL picks the upstream patch.
commit 47a1f4639c010e63249c794ea600dc5555e061ac
Author: Derek Stavis <dekestavis@gmail.com>
Date:   Sun May 10 10:37:33 2015 -0300

    Include xorg-server.h to fix build errors on newest glibc

BUG=chromium:672915
TEST=xf86-video-armsoc builds with glibc 2.23.

Change-Id: I341198458422c38527128b7e9d0a7e15a79b7abf
Reviewed-on: https://chromium-review.googlesource.com/418698
Commit-Ready: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Yunlian Jiang <yunlian@chromium.org>
diff --git a/src/bo_rockchip.c b/src/bo_rockchip.c
index 320e22e..c8a5c63 100644
--- a/src/bo_rockchip.c
+++ b/src/bo_rockchip.c
@@ -25,6 +25,7 @@
 #include <sys/mman.h>
 #include <assert.h>
 #include <errno.h>
+#include <xorg-server.h>
 #include <xf86.h>
 #include <xf86drm.h>
 #include <xf86drmMode.h>
diff --git a/src/omap_dumb.c b/src/omap_dumb.c
index a3b5152..d6663c5 100644
--- a/src/omap_dumb.c
+++ b/src/omap_dumb.c
@@ -25,6 +25,7 @@
 #include <sys/mman.h>
 #include <assert.h>
 #include <errno.h>
+#include <xorg-server.h>
 
 #include <xf86.h>
 #include <xf86drm.h>