go/svc: finish porting services to Bazel

The following services were never ported:
 - cmc-proxy
 - arista-proxy
 - m6220-proxy
 - topo

They now build.

Change-Id: I0688bfe43cdff946e6662e21969ef539382c0e86
diff --git a/go/svc/m6220-proxy/main.go b/go/svc/m6220-proxy/main.go
index 54ce428..a2ca4db 100644
--- a/go/svc/m6220-proxy/main.go
+++ b/go/svc/m6220-proxy/main.go
@@ -14,8 +14,8 @@
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 
-	ipb "code.hackerspace.pl/hscloud/go/proto/infra"
 	pb "code.hackerspace.pl/hscloud/go/svc/m6220-proxy/proto"
+	ipb "code.hackerspace.pl/hscloud/proto/infra"
 )
 
 var (