[roll] Roll third_party/go [go] Increase go_os_test timeout to 3m

FIDL is currently undergoing a wire format migration. As part
of this, a transformer is used between the old and new wire
format which adds extra latency. This has the effect of slowing
down the go_os_test on the ASAN build just enough that it exceeds
the existing 2 minute timeout.

This unblocks:
https://fuchsia-review.googlesource.com/c/fuchsia/+/574261

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/go/+/581903
Original-Revision: c5f39976d1991f7ca31f5712f489c5fb9b5bbc89
GitOrigin-RevId: 9a5b370d4320343f01d9a44366dc74b3fb1909e3
Change-Id: Ice3e355bd95a756eafd721f79ec4ebb0b94336a0
diff --git a/third_party/flower b/third_party/flower
index 6351706..1738e78 100644
--- a/third_party/flower
+++ b/third_party/flower
@@ -133,7 +133,7 @@
     <project name="third_party/go"
              remote="https://fuchsia.googlesource.com/third_party/go"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="3145e4acd9c1154cc296d60438e42a254533bd23"
+             revision="c5f39976d1991f7ca31f5712f489c5fb9b5bbc89"
              path="third_party/go"/>
     <project name="third_party/github.com/intel/intel-linux-processor-microcode-data-files"
              path="third_party/github.com/intel/intel-linux-processor-microcode-data-files"