Rebuild every target if Makefile changes

Makefile

@@ -3,6 +3,10 @@
 #
 # GNU Make required
 #
+
+# Rebuild every target if Makefile changes
+.EXTRA_PREREQS:= $(abspath $(lastword $(MAKEFILE_LIST)))
+
 COMPILE_PLATFORM=$(shell uname | sed -e 's/_.*//' | tr '[:upper:]' '[:lower:]' | sed -e 's/\//_/g')
 COMPILE_ARCH=$(shell uname -m | sed -e 's/i.86/x86/' | sed -e 's/^arm.*/arm/')