util/lint/lint-stable-003-whitespace: Ignore temporary files ending with a tilde

Some editors like gedit create auxiliary files ending with a
tilde '~'. As these are not checked into the Git repository, do
not check these for whitespace errors.

Change-Id: I2c4cf00f9d623be73ea3bbb7b2da4f1e1900c8e9
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/3952
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Jonathan A. Kollasch <jakllsch@kollasch.net>

util/lint/lint-stable-003-whitespace

@@ -32,6 +32,7 @@ find src util -name .svn -type d -prune -o \
 	-name microcode-\*.h -prune -o \
 	-name \*.?_shipped -prune -o \
 	-name \*.[18] -prune -o \
+	-name \*~ -prune -o \
 	-name kconfig -type d -prune -o \
 	-name romcc -type d -prune -o \
 	-name crossgcc -type d -prune -o \