Re: code review 6297087: runtime: fix struct Sigaction for Linux/ARM (issue 6297087)

*** Submitted as
http://code.google.com/p/go/source/detail?r=6eefce99091e ***

runtime: fix struct Sigaction for Linux/ARM
         if we were to use sizeof(sa.sa_mask) instead of 8 as the last
argument
         to rt_sigaction, we would have already fixed this bug, so also
updated
         Linux/386 and Linux/amd64 files to use that; also test the
return value
         of rt_sigaction.

R=dave, rsc
CC=golang-dev
http://codereview.appspot.com/6297087

http://codereview.appspot.com/6297087/