cmd/ld: ignore PE sections that are not code or data
cmd/ld: ignore PE sections that are not code or data

Update issue 5106
Update issue 5273

R=minux.ma, r
CC=golang-dev
https://codereview.appspot.com/8715043

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