[][openwrt-24][common][bsp][Add initial filogic target for unified autobuild]

[Description]
Add initial filogic target for unified autobuild

[Release-log]
N/A

Change-Id: I257aa0f0eed9ab64991b3820e75ebb526e6830bf
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9541685
diff --git a/autobuild/unified/filogic/master/patches-base/0002-mediatek-filogic-add-extra-image-definitions.patch b/autobuild/unified/filogic/master/patches-base/0002-mediatek-filogic-add-extra-image-definitions.patch
new file mode 100644
index 0000000..614a6a7
--- /dev/null
+++ b/autobuild/unified/filogic/master/patches-base/0002-mediatek-filogic-add-extra-image-definitions.patch
@@ -0,0 +1,10 @@
+--- a/target/linux/mediatek/image/Makefile
++++ b/target/linux/mediatek/image/Makefile
+@@ -34,6 +34,7 @@ define Device/Default
+ endef
+ 
+ include $(SUBTARGET).mk
++-include $(SUBTARGET)-extra.mk
+ 
+ define Image/Build
+ 	$(call Image/Build/$(1),$(1))