cmd/compilebench: put in correct subdirectory

Apparently there was a typo during initial import,
and compilebench was placed at the top level,
rather than in the cmd subdirectory. Oops. Fix that.

Change-Id: Ibea9ed132dca26c022ea02933defec9534105f18
Reviewed-on: https://go-review.googlesource.com/39792
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed