[kernel] implement xkcd#149

[Adam Jackson]

commit 08e6eed4b2d941f6db23edbf3573c392018d7729
Author: Adam Jackson <ajax at redhat.com>
Date:   Thu Oct 13 11:52:10 2011 -0400

    implement xkcd#149

 Makefile |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/Makefile b/Makefile
index 3e9e3a8..77136a7 100644
--- a/Makefile
+++ b/Makefile
@@ -309,3 +309,12 @@ tag-$(branch-upstream) := $(shell \
 	sed -n 's/^.*  *//;s/\.bz2$$//;s/patch-/v/;/^v/h;$${g;p}' sources)
 endif
 endif
+
+ifeq ($(MAKECMDGOALS),me a sandwich)
+.PHONY: me a sandwich
+me a:
+	@:
+
+sandwich:
+	@[ `id -u` -ne 0 ] && echo "What? Make it yourself." || echo Okay.
+endif