Add script to pull svgs to svgs/ and add to .gitignore

Change-Id: I77f78e7b27963a087ace30b8ce41118dd76c9026
Reviewed-on: https://skia-review.googlesource.com/150914
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/.gitignore b/.gitignore
index c9b9fcd..57db7a4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,6 +34,7 @@
 
 sampleapp_prefs.txt
 /skps
+/svgs
 third_party/externals
 tools/skp/page_sets/data/*.json
 tools/skp/page_sets/data/*.wpr