arm: fix build
arm: fix build

Effectively reverts https://code.google.com/p/go/source/detail?r=8c52477401ad
Should make ARM build pass again, but untested.
Probably still bugs involving reflect.call somewhere.

R=ken2
CC=golang-dev
http://codereview.appspot.com/2416042

pombredanne/go-deleteme,gnanderson/go,h8liu/golang,tv42/old-go,tv42/old-go,apparentlymart/golang,h8liu/golang,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,ssrl/go,apparentlymart/golang,gnanderson/go,dsriram/golang,dsriram/golang,apparentlymart/golang,tv42/old-go,gnanderson/go,gnanderson/go,pombredanne/go-deleteme,dsriram/golang,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,tv42/old-go,h8liu/golang,gnanderson/go,tv42/old-go,pombredanne/go-deleteme,pombredanne/go-deleteme,h8liu/golang,ssrl/go,h8liu/golang,dsriram/golang,dsriram/golang,dsriram/golang,gnanderson/go,h8liu/golang,ssrl/go,h8liu/golang,gnanderson/go,ssrl/go,pombredanne/go-deleteme,dsriram/golang,ssrl/go,apparentlymart/golang,ssrl/go,tv42/old-go,ssrl/go