Add package grpc to the index

index/grpc.mk

@@ -0,0 +1,7 @@
+PACKAGES += grpc
+pkg_grpc_name = grpc
+pkg_grpc_description = gRPC server in Erlang
+pkg_grpc_homepage = https://github.com/Bluehouse-Technology/grpc
+pkg_grpc_fetch = git
+pkg_grpc_repo = https://github.com/Bluehouse-Technology/grpc
+pkg_grpc_commit = master