utils/check-package: check files in utils/

All the errors in existing scripts in utils/ have been fixed, so nothing
needs to be added to .checkpackageignore.

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

utils/check-package

@@ -113,6 +113,7 @@ DO_CHECK_INTREE = re.compile(r"|".join([
     r"package/",
     r"system/",
     r"toolchain/",
+    r"utils/",
     ]))
 DO_NOT_CHECK_INTREE = re.compile(r"|".join([
     r"boot/barebox/barebox\.mk$",