fix building when target arch != mipsel (arch defaults to mipsel if not set when entering linux_dir)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1662 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/package/madwifi/Makefile

@@ -36,6 +36,7 @@ $(PKG_BUILD_DIR)/.configured:
 
 $(PKG_BUILD_DIR)/.built:
 	$(MAKE) -C $(PKG_BUILD_DIR) \
+		ARCH="$(ARCH)" \
 		TARGET="$(HAL_TARGET)" \
 		TOOLPREFIX="$(KERNEL_CROSS)" \
 		KERNELPATH="$(KERNEL_DIR)"