liblink: fix arm build
liblink: fix arm build

The arm puts the text flags in a different place
than the other architectures. This needs to be
cleaned up.

TBR=minux
CC=golang-codereviews
https://codereview.appspot.com/71260043

tv42/old-go,tv42/old-go,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,pombredanne/go-deleteme,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go