add make steps for grpc
diff --git a/Makefile.am b/Makefile.am
index c2727ad..43ca5b4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,7 +3,9 @@
 
 all: grpc-c
 
-grpc-c:
+grpc:
+	cd third_party/grpc; git submodule update --init; make; sudo make install
+
+grpc-c: grpc
 	cd third_party/grpc-c; autoreconf --install; git submodule update --init; ./configure
 	make -C third_party/grpc-c
-