debug/goobj: add package for reading new Go object files
debug/goobj: add package for reading new Go object files

R=golang-dev, r, iant
CC=golang-dev
https://codereview.appspot.com/40610043

apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang