test: match gccgo error messages for syntax/chan.go.
test: match gccgo error messages for syntax/chan.go.

chan.go:11:1: error: unexpected ‘}’ in channel type
chan.go:13:16: error: unexpected ‘)’ in channel type
chan.go:16:16: error: unexpected comma in channel type

R=golang-dev, rsc1
CC=golang-dev
http://codereview.appspot.com/4313055

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