build: fix for sourcing target image config a when target is being replaced

Sourcing of image/Config.in will not happen
When a target is installed from target/linux/feeds/

Signed-off-by: Prasun Maiti <[email protected]>

config/Config-images.in

@@ -286,6 +286,7 @@ menu "Target Images"
 	comment "Image Options"
 
 	source "target/linux/*/image/Config.in"
+	source "target/linux/feeds/*/image/Config.in"
 
 	config TARGET_KERNEL_PARTSIZE
 		int "Kernel partition size (in MiB)"