From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sun, 28 Feb 2016 02:29:56 +0100
Subject: brcm2708-gpu-fw: move pkg build dir to kernel build dir to fix rebuild bugs after cleaning the kernel tree

Backport of r48732

diff --git a/package/kernel/brcm2708-gpu-fw/Makefile b/package/kernel/brcm2708-gpu-fw/Makefile
index eee85e0..286984b 100644
--- a/package/kernel/brcm2708-gpu-fw/Makefile
+++ b/package/kernel/brcm2708-gpu-fw/Makefile
@@ -16,7 +16,7 @@ PKG_SOURCE:=$(PKG_REV).tar.gz
 PKG_SOURCE_URL:=https://github.com/Hexxeh/rpi-firmware/archive/
 PKG_MD5SUM:=f5683c1dcb255714942f7c9fd61b3a0a
 
-PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)/rpi-firmware-$(PKG_REV)
+PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/$(PKG_NAME)/rpi-firmware-$(PKG_REV)
 
 include $(INCLUDE_DIR)/package.mk