change -delete to -exec rm {} \;

TBR=maruel@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/8073008

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@103214 0039d316-1c4b-4281-b951-d872f2087c98

update_depot_tools

@@ -95,4 +95,4 @@ then
   fi
 fi
 
-find "$base_dir" -iname "*.pyc" -delete
+find "$base_dir" -iname "*.pyc" -exec rm {} \;