[roll] Roll third_party/go [zx] Add SocketPeek

Clean up some uses of iota while I'm here.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/go/+/474857
Original-Revision: ef95c8311b5e53cd1f021b9ed3f7b59ef60005cf
GitOrigin-RevId: 68d4447bfe8a228b6baa3107277b0fb63a74ee71
Change-Id: I9a4736508f813d8cbfef00e01a718de11702e516
diff --git a/third_party/flower b/third_party/flower
index 63cc1f6..a9cfbed 100644
--- a/third_party/flower
+++ b/third_party/flower
@@ -132,7 +132,7 @@
     <project name="third_party/go"
              remote="https://fuchsia.googlesource.com/third_party/go"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="ab310e88d926aad0c570347aa71ea9ffefd6d12c"
+             revision="ef95c8311b5e53cd1f021b9ed3f7b59ef60005cf"
              path="third_party/go"/>
     <project name="third_party/go.uber.org/multierr"
              remote="https://fuchsia.googlesource.com/third_party/go.uber.org/multierr"