fix x86 image build order (fixes #3317)

SVN-Revision: 11359

target/linux/x86/image/Makefile

@@ -96,9 +96,9 @@ define Image/BuildKernel
 endef
 
 define Image/Build
+	$(call Image/Build/$(1))
 	$(call Image/Build/grub,$(1))
 	$(call Image/Build/vdi,$(1))
-	$(call Image/Build/$(1))
 	$(CP) $(KDIR)/root.$(1) $(BIN_DIR)/openwrt-$(BOARD)-$(1).fs
 	$(CP) $(KDIR)/bzImage $(BIN_DIR)/openwrt-$(BOARD)-vmlinuz
 endef