cmd/compilebench: add more linker benchmarking
cmd/compilebench: add more linker benchmarking

Change-Id: I84ac9637b9d4221f38acbd2bfe8e1d1fc3097f48
Reviewed-on: https://go-review.googlesource.com/c/tools/+/194680
Run-TryBot: Jeremy Faller <b3f594e10a9edcf5413cf1190121d45078c62290@golang.org>
Reviewed-by: Austin Clements <7ea35d812706d9213868749011af1ed4fa2f6aa0@google.com>

golang/tools,golang/tools,golang/tools,golang/tools,golang/tools