benchstat: skip test on GOOS=android
benchstat: skip test on GOOS=android

Change-Id: Ib5180af43a22168e57b94deec2cd37b980365ab0
Reviewed-on: https://go-review.googlesource.com/c/perf/+/165697
Run-TryBot: Elias Naur <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@eliasnaur.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/perf,golang/perf