bin/sync-and-gyp: start using gclient

stop using hard-to-maintain git-sync-deps

BUG=skia:4885

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1693963005

Review URL: https://codereview.chromium.org/1693963005
diff --git a/.gitignore b/.gitignore
index f0e3e29..e7d565c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 *.iml
 .DS_Store
 .android_config
+.deps_sha1
 .gclient*
 .gm-actuals
 .gradle