.bazelrc: re-enable stamping in go

Change-Id: Icb25fa970e090730803ff964f26e7c0dc5295fae
diff --git a/.bazelrc b/.bazelrc
index 03cd77d..419641e 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -2,6 +2,7 @@
 build --host_force_python=PY2
 test --host_force_python=PY2
 run --host_force_python=PY2
+build --stamp
 build --workspace_status_command=./bzl/workspace-status.sh
 test --build_tests_only
 test --test_output=errors