gc: package paths in symbol names: don't escape periods before last slash, always escape >=0x7f.
gc: package paths in symbol names: don't escape periods before last slash, always escape >=0x7f.

R=rsc
CC=golang-dev
http://codereview.appspot.com/5323071

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