kexecboot_0.6: fix build with gcc 5

Resolving the issue:

rgb.h:55:1: warning: inline function 'rgba2comp' declared but never defined
|  rgba2comp(kx_rgba rgba, kx_ccomp *red, kx_ccomp *green,
|  ^

Fix C99 inline semantic as documented here:
https://gcc.gnu.org/gcc-5/porting_to.html

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-initramfs/recipes-bsp/kexecboot/files/0005-rgb.h-fix-build-with-gcc5.patch

@@ -0,0 +1,34 @@
+From b2c4fc69868a4831ec798ad98f5e7fce200cf0e3 Mon Sep 17 00:00:00 2001
+From: Andrea Adami <andrea.adami@gmail.com>
+Date: Thu, 24 Sep 2015 00:02:48 +0200
+Subject: [PATCH] rgb.h: fix build with gcc 5 (C99 inline semantic)
+
+Building with gcc 5.2 we trigger the following error:
+
+rgb.h:55:1: warning: inline function 'rgba2comp' declared but never defined
+|  rgba2comp(kx_rgba rgba, kx_ccomp *red, kx_ccomp *green,
+|  ^
+
+https://gcc.gnu.org/gcc-5/porting_to.html
+
+Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
+---
+ rgb.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/rgb.h b/rgb.h
+index 0ba987a..4f64622 100644
+--- a/rgb.h
++++ b/rgb.h
+@@ -51,7 +51,7 @@ typedef struct {
+ } kx_named_color;
+ 
+ /* Convert RGBA uint32 to red/green/blue/alpha components */
+-inline void
++extern inline void
+ rgba2comp(kx_rgba rgba, kx_ccomp *red, kx_ccomp *green,
+ 		kx_ccomp *blue, kx_ccomp *alpha);
+ 
+-- 
+1.9.1
+

meta-initramfs/recipes-bsp/kexecboot/kexecboot_0.6.bb

@@ -47,6 +47,8 @@ SRC_URI += "\
             file://0002-kexecboot-fix-configure-warnings.patch \
             file://0003-kexecboot-do-not-hardcode-MOUNTPOINT.patch \
             file://0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch \
+            \
+            file://0005-rgb.h-fix-build-with-gcc5.patch \
             "
 
 inherit autotools