Match gccgo error messages.

Match gccgo error messages.

bug197.go:10:5: error: incompatible type in initialization
bug197.go:11:5: error: incompatible type in initialization
bug197.go:12:5: error: incompatible type in initialization
bug197.go:13:5: error: incompatible type in initialization
bug197.go:20:13: error: incompatible types in binary expression
bug197.go:21:27: error: incompatible types in binary expression

R=rsc
DELTA=6  (0 added, 0 deleted, 6 changed)
OCL=34135
CL=34177