create-pull-request: remove output directory

When 'git request-pull' fails it makes sense to remove output
directory. Otherwise create-pull-request will complain that
output directory already exists on the next run.

(From OE-Core rev: 8535784ba84060e0e7ca05e7771a58f9c70c69b9)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/create-pull-request

@@ -229,6 +229,7 @@ else
 fi
 if [ $? -ne 0 ]; then
 	echo "ERROR: git request-pull reported an error"
+	rm -rf $ODIR
 	exit 1
 fi