Make proto target depend on minimaltools, so we have protos installed in dist

Signed-off-by: Andrew Mason <amason@slack-corp.com>

Makefile

@@ -179,9 +179,9 @@ ifndef NOBANNER
 	echo $$(date): Compiling proto definitions
 endif
 
-$(PROTO_GO_OUTS): install_protoc-gen-go proto/*.proto
+$(PROTO_GO_OUTS): minimaltools install_protoc-gen-go proto/*.proto
 	for name in $(PROTO_SRC_NAMES); do \
-		$(VTROOT)/bin/protoc --go_out=plugins=grpc:. -I/usr/local/include:proto proto/$${name}.proto && \
+		$(VTROOT)/bin/protoc --go_out=plugins=grpc:. -I${PWD}/dist/vt-protoc-3.6.1/include:proto proto/$${name}.proto && \
 		goimports -w vitess.io/vitess/go/vt/proto/$${name}/$${name}.pb.go; \
 	done
 	cp -Rf vitess.io/vitess/go/vt/proto/* go/vt/proto