embed: add example
embed: add example

Change-Id: I4e50e469047ac7efbf4ed464e238000dbdf53d6b
GitHub-Last-Rev: 8d29b73d1160b4498a38aa3ef6530ee5c9353186
GitHub-Pull-Request: golang/go#48785
Reviewed-on: https://go-review.googlesource.com/c/go/+/353936
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
Trust: Alexander Rakoczy <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@golang.org>

golang/go,cloudflare/go,cloudflare/go,cloudflare/go,nawawi/go,golang/go,CAFxX/go,cloudflare/go,nawawi/go,cloudflare/go,golang/go,golang/go,nawawi/go,nawawi/go,golang/go,CAFxX/go,CAFxX/go,nawawi/go,CAFxX/go,cloudflare/go,nawawi/go,cloudflare/go,golang/go,CAFxX/go,cloudflare/go,CAFxX/go,golang/go,CAFxX/go,nawawi/go,golang/go,nawawi/go,CAFxX/go