The ARM assembly doesn't work for NaCl on ARM because it doesn't meet the required rules. This change disables it on ARM and also fixes the issue that the build constraints in sum_arm.s would be ignored because they came after the #include. Change-Id: I6cb3815ec62ac4686a6e72f405af104293586bb6 Reviewed-on: https://go-review.googlesource.com/31264 Run-TryBot: Adam Langley <agl@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>