bazel/README.md references "envoy-static.stripped.stamped" which doesn't exist

[tehranian]

Title: bazel/README.md references envoy-static.stripped.stamped which doesn't exist

Description:
From the instructions for building a Release Build at https://github.com/envoyproxy/envoy/blame/master/bazel/README.md#L333 :

bazel --bazelrc=/dev/null build -c opt //source/exe:envoy-static.stripped.stamped

But when I run this I get:

ERROR: no such target '//source/exe:envoy-static.stripped.stamped': target 'envoy-static.stripped.stamped' not declared in package 'source/exe' defined by /jenkins/src/envoy/source/exe/BUILD

From https://github.com/envoyproxy/envoy/blob/master/ci/do_ci.sh#L17, looks like the correct instructions for a release build are to build //source/exe:envoy-static (line 20), then run strip on the resulting binary (line 32)?

Please confirm and I'm happy to update the README with corrected instructions. Thanks!

[mattklein123]

Yeah, IIRC we took stripping out of bazel itself but I don't recall the details. cc @htuch @jmillikin-stripe who might remember. Definitely would appreciate a doc update.

[htuch]

I think this was in #3021, @jmillikin-stripe can probably provide the insight. Yeah, I think a doc fix is the right thing here.

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in the next 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

[jmillikin-stripe]

Yes, the docs are out of date -- //source/exe:envoy-static.stripped is the correct path. You can append .stripped to any C++ binary target to get a stripped output, no need to strip manually.