Fix for gRPC version in GNMI stubs

Change-Id: I416455aeca5ccbcf8a6b638e2643152545082e16
diff --git a/protocols/gnmi/stub/BUCK b/protocols/gnmi/stub/BUCK
index 4bb2fe5..8a29090 100644
--- a/protocols/gnmi/stub/BUCK
+++ b/protocols/gnmi/stub/BUCK
@@ -1,7 +1,7 @@
 include_defs('//bucklets/grpc.bucklet')
 
 PROTOBUF_VER = '3.2.0'
-GRPC_VER = '1.3.0'
+GRPC_VER = '1.3.1'
 
 COMPILE_DEPS = [
     '//lib:CORE_DEPS',