Add link to general Google privacy policy.

No-Try: true
Docs-Preview: https://skia.org/?cl=182448
Bug: skia:
Change-Id: I334cb6e66a62b1bb2631f7e806d48f75612020ea
Reviewed-on: https://skia-review.googlesource.com/c/182448
Auto-Submit: Joe Gregorio <jcgregorio@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
diff --git a/site/user/privacy.md b/site/user/privacy.md
new file mode 100644
index 0000000..4d5a15b
--- /dev/null
+++ b/site/user/privacy.md
@@ -0,0 +1,5 @@
+Privacy
+=======
+
+When interacting with any of the web applications provided on
+skia.org we follow this [privacy policy](https://policies.google.com/privacy).