[dev.cc] cmd/go: install new6g etc (once they are committed) to tool directory

Change-Id: I2853535ab6c79d14f430c780161e4c35c52d9fb3
Reviewed-on: https://go-review.googlesource.com/4839Reviewed-by: Rob Pike <r@golang.org>

src/cmd/go/pkg.go

@@ -401,6 +401,10 @@ var goTools = map[string]targetDir{
 	"cmd/new6a":                            toTool,
 	"cmd/new8a":                            toTool,
 	"cmd/new9a":                            toTool,
+	"cmd/new5g":                            toTool,
+	"cmd/new6g":                            toTool,
+	"cmd/new8g":                            toTool,
+	"cmd/new9g":                            toTool,
 	"cmd/nm":                               toTool,
 	"cmd/objdump":                          toTool,
 	"cmd/objwriter":                        toTool,