THRIFT-4723 Consolidate C#/netcore into new netstd language target
Client: netstd
Patch: Jens Geyer

This closes #1710
diff --git a/compiler/cpp/CMakeLists.txt b/compiler/cpp/CMakeLists.txt
index 6f7ae5d..17dae47 100644
--- a/compiler/cpp/CMakeLists.txt
+++ b/compiler/cpp/CMakeLists.txt
@@ -91,6 +91,7 @@
 THRIFT_ADD_COMPILER(json    "Enable compiler for JSON" ON)
 THRIFT_ADD_COMPILER(lua     "Enable compiler for Lua" ON)
 THRIFT_ADD_COMPILER(netcore "Enable compiler for .NET Core" ON)
+THRIFT_ADD_COMPILER(netstd  "Enable compiler for .NET Standard" ON)
 THRIFT_ADD_COMPILER(ocaml   "Enable compiler for OCaml" ON)
 THRIFT_ADD_COMPILER(perl    "Enable compiler for Perl" ON)
 THRIFT_ADD_COMPILER(php     "Enable compiler for PHP" ON)