cmd/toolstash: don't pass -N when compiling runtime

The runtime cannot be compiled with optimizations disabled.
This lead to very confusing error messages
when toolstash -cmp failed.

Change-Id: Ie341d633ff9b26693b475957309591ff0757f1ab
Reviewed-on: https://go-review.googlesource.com/38378
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
1 file changed