Makefile.inc: put UROOT_ADDITIONAL_CMDS before UROOT_BASE_CMDS

Frequently, users may want to extend the uroot build with files
as well as u-root commands, by using the -files switch.

The way the Makefile.inc ordered the two variables made this impossible,
since UROOT_ADDITIONAL_CMDS was placed after UROOT_BASE_CMDS,
and hence it could not include switches.

Switch the order, and now users can add files as well as
commands, e.g., set
UROOT_ADDITIONAL_CMDS="-files /etc -files /bin/bash boot"
and get these extra commands.

Signed-off-by: Ronald G. Minnich <rminnich@google.com>

Author: rminnichcodeu

Makefile.inc

@@ -249,8 +249,8 @@ $(INITRAMFS_OUT): $(INITRAMFS_DEPS_FLAG) $(INITRAMFS_PATCH_FLAG)
 	GOPATH=$(INITRAMFS_BUILD_DIR)/gopath:$(UROOT_ADDITIONAL_GOPATH) \
 	  $(INITRAMFS_BUILD_DIR)/go/bin/go run github.com/u-root/u-root \
 	    -build=bb -o $@ -uinitcmd=$(UINIT_CMD) \
-	    $(UROOT_BASE_CMDS) \
 	    $(UROOT_ADDITIONAL_CMDS) \
+	    $(UROOT_BASE_CMDS) \
 	  || { rm -f $@; exit 1; }
 
 ifeq "$(ALWAYS_BUILD_INITRAMFS)" "1"