Add dev mode paths to .gitignore

Running site_utils/setup_dev_autotest.sh causes a few directories
created in the autotest tree. This change ensures that git ignores
them.

BUG=none
TEST=manual
   . running `git status' does not show the new paths

Change-Id: I7998a5fb18357900c953a12150dfad1a33134ad2
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/38951
Reviewed-by: Chris Sosa <sosa@chromium.org>
diff --git a/.gitignore b/.gitignore
index fb652fe..ad1fb37 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,3 +41,6 @@
 server/tmp
 tko/parsers/test/site_scenarios
 ExternalSource
+/frontend/client/www/
+/shadow_config.ini
+/site-packages/