debug/gosym: do not run when cross-compiling
debug/gosym: do not run when cross-compiling

R=r
CC=golang-dev
http://codereview.appspot.com/2737041

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