libdrm: Fix build failure unearthed by uclibc

uclibc wants to know value of __USE_GNU for certain
header prototypes to be enabled. So we move the config.h
header up in search list.

(From OE-Core rev: 086679cfbc30dba4af2f650984084195e5171b8f)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/drm/libdrm/GNU_SOURCE_definition.patch

@@ -0,0 +1,30 @@
+uclibc headers need to know if _GNU_SOURCE is defined or not and its defined
+in config.h so include it first to get the definition if its there fixed build
+problems on uclibc
+
+test_decode.c:107:2: error: implicit declaration of function 'open_memstream' [-Werror=implicit-function-declaration]
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Pending
+
+Index: libdrm-2.4.30/intel/test_decode.c
+===================================================================
+--- libdrm-2.4.30.orig/intel/test_decode.c	2012-02-03 14:28:46.409355918 -0800
++++ libdrm-2.4.30/intel/test_decode.c	2012-02-03 14:29:02.357356689 -0800
+@@ -21,6 +21,8 @@
+  * IN THE SOFTWARE.
+  */
+ 
++#include "config.h"
++
+ #include <string.h>
+ #include <stdlib.h>
+ #include <stdio.h>
+@@ -31,7 +33,6 @@
+ #include <sys/mman.h>
+ #include <err.h>
+ 
+-#include "config.h"
+ #include "intel_bufmgr.h"
+ #include "intel_chipset.h"
+ 

meta/recipes-graphics/drm/libdrm_2.4.30.bb

@@ -2,9 +2,11 @@ require libdrm.inc
 
 LIC_FILES_CHKSUM = "file://xf86drm.c;beginline=9;endline=32;md5=c8a3b961af7667c530816761e949dc71"
 
-PR = "r0"
+PR = "r1"
 
-SRC_URI += "file://installtests.patch"
+SRC_URI += "file://installtests.patch \
+            file://GNU_SOURCE_definition.patch \
+           "
 
 SRC_URI[md5sum] = "9f57a68b2c0836b55ebcbc241f6ca175"
 SRC_URI[sha256sum] = "cacea9c157ec824ad278a06f4910659b2f3ae69686518ece8d6967843cddcd56"