Add grpc-c
diff --git a/.gitmodules b/.gitmodules
index 3fd299b..a3495f3 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "third_party/protobuf-c"]
 	path = third_party/protobuf-c
 	url = https://github.com/shadansari/protobuf-c.git
+[submodule "third_party/grpc-c"]
+	path = third_party/grpc-c
+	url = https://github.com/Juniper/grpc-c.git
diff --git a/third_party/grpc-c b/third_party/grpc-c
new file mode 160000
index 0000000..be82ab1
--- /dev/null
+++ b/third_party/grpc-c
@@ -0,0 +1 @@
+Subproject commit be82ab1605717f33e2e0d3038996ea46d9efe25e