more specific config.mak can overwrote more general config.mak

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Makefile.hw

 # Makefile for qemu target independent devices.
 
-include config.mak
 include ../config-host.mak
+include config.mak
 include $(SRC_PATH)/rules.mak
 
 .PHONY: all