gccgo does not distinguish "use" and "assign" in these error messages.  Match gccgo output.
gccgo does not distinguish "use" and "assign" in these error
messages.  Match gccgo output.

named1.go:32:2: error: argument 0 has wrong type (cannot use type bool as type Bool)
named1.go:33:2: error: argument 0 has wrong type (cannot use type bool as type Bool)
named1.go:35:5: error: incompatible type for map index (cannot use type bool as type Bool)
named1.go:36:12: error: incompatible type for map assignment (cannot use type Bool as type bool)
named1.go:38:5: error: incompatible types in assignment (cannot use type bool as type Bool)
named1.go:40:2: error: argument 0 has wrong type (cannot use type bool as type Bool)
named1.go:42:5: error: incompatible type for receive (cannot use type bool as type Bool)
named1.go:46:5: error: incompatible type for type guard (cannot use type bool as type Bool)
named1.go:50:5: error: incompatible type for type guard (cannot use type bool as type Bool)
named1.go:53:2: error: argument 0 has wrong type (cannot use type bool as type Bool)
named1.go:54:5: error: incompatible types in assignment (cannot use type bool as type Bool)

R=rsc
DELTA=4  (0 added, 0 deleted, 4 changed)
OCL=35943
CL=35943
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go