cmd/gomote, cmd/upload, build: add gccgo-specific TODOs and constants

Change-Id: If4060367da6e9a769b692f408584104193e14502
Reviewed-on: https://go-review.googlesource.com/16085
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/build.go b/build.go
index f69b57c..cd75355 100644
--- a/build.go
+++ b/build.go
@@ -27,6 +27,7 @@
 	case ProdCoordinator:
 		return "farmer.golang.org:443", nil
 	case StagingCoordinator:
+		// TODO(cmang): make this project dependent.
 		return "104.154.113.235:443", nil
 	}
 	if ci == "" {