Makes them compatible with the new asm.
Applied mechanically from vet diagnostics.

Manual edits: the names for arguments in time·now(SB) in runtime/sys_*_arm.s.

Change-Id: Ib295390d9509d306afc67714e3f50dc832256625
Reviewed-on: https://go-review.googlesource.com/5576
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>