arm: fix build previous version was built with -l32; should be -b32
arm: fix build
previous version was built with -l32; should be -b32

R=ken
CC=golang-dev
http://codereview.appspot.com/3867044

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang