ld: be less picky about bad line number info
ld: be less picky about bad line number info

Fixes issue 1175.

R=lvd
CC=golang-dev
http://codereview.appspot.com/2439041

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