[PATCH] uml - some comments about forcing /bin/bash

Changes a comment about forcing /bin/bash as shell for the UML Makefile.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/Makefile

@@ -5,7 +5,8 @@
 
 ARCH_DIR = arch/um
 OS := $(shell uname -s)
-#We require it or things break.
+# We require bash because the vmlinux link and loader script cpp use bash
+# features.
 SHELL := /bin/bash
 
 filechk_gen_header = $<