lint: don't check for whitespace in jpeg images

Change-Id: I0e1bbb198be6512e9f696c3dddca7f65436e6f5b
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/12182
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
diff --git a/util/lint/lint-stable-003-whitespace b/util/lint/lint-stable-003-whitespace
index 3f60040..75eb9f2 100755
--- a/util/lint/lint-stable-003-whitespace
+++ b/util/lint/lint-stable-003-whitespace
@@ -19,5 +19,5 @@
 # DESCR: Check for superfluous whitespace in the tree
 
 LC_ALL=C export LC_ALL
-grep -l "[[:space:]][[:space:]]*$" `git ls-files src util |egrep -v "(^3rdparty|^src/vendorcode/|^util/kconfig/|^util/nvidia/cbootimage$|\<COPYING\>|\<LICENSE\>|\<README\>|_shipped$|\.patch$|\.bin$|\.hex$)"` | \
+grep -l "[[:space:]][[:space:]]*$" `git ls-files src util |egrep -v "(^3rdparty|^src/vendorcode/|^util/kconfig/|^util/nvidia/cbootimage$|\<COPYING\>|\<LICENSE\>|\<README\>|_shipped$|\.patch$|\.bin$|\.hex$|\.jpg$)"` | \
 	sed -e "s,^.*$,File & has lines ending with whitespace.,"