Update goyt.tar.gz with @164843480, add README

Bug:
Change-Id: Iaf97fe2579c9e8f632ff26c41535f5766aeacc29
diff --git a/third_party/goyt.tar.gz.sha1 b/third_party/goyt.tar.gz.sha1
index 873f829..0630836 100644
--- a/third_party/goyt.tar.gz.sha1
+++ b/third_party/goyt.tar.gz.sha1
@@ -1 +1 @@
-9ce39f3b3b0db4661946863cbb8fb073df174410
\ No newline at end of file
+9237df6f97a6ef87cab77de8e53abf457793df9a
\ No newline at end of file