cmd/link: typo in error message

Change-Id: Ideeef320d6a01a10c89524b6d895a64210a60f64
Reviewed-on: https://go-review.googlesource.com/19693Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/link/internal/ld/dwarf.go

@@ -951,7 +951,7 @@ func defgotype(gotype *LSym) *DWDie {
 	}
 
 	if !strings.HasPrefix(gotype.Name, "type.") {
-		Diag("dwarf: type name doesn't start with \".type\": %s", gotype.Name)
+		Diag("dwarf: type name doesn't start with \"type.\": %s", gotype.Name)
 		return mustFind(&dwtypes, "<unspecified>")
 	}