Match gccgo error messages.
Match gccgo error messages.

bug090.go:41:6: error: floating point constant truncated to integer
bug090.go:32:6: error: floating point constant truncated to integer
bug090.go:34:14: error: floating point constant truncated to integer
bug090.go:37:5: error: incompatible types in assignment
bug090.go:40:5: error: incompatible types in assignment

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=26564
CL=26574
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go