Enabling USE_CPP_RPC ON requires HEXAGON_SDK

Hello, When I try to compile runtime and rpc_server binary, I have update config.cmake:

sed -i 's/set(USE_CPP_RPC OFF)/set(USE_CPP_RPC ON)/g' config.cmake

I’m getting following error:

CMake Error at cmake/modules/HexagonSDK.cmake:47 (message):
  Cannot validate Hexagon SDK in /path/to/sdk
Call Stack (most recent call first):
  apps/cpp_rpc/CMakeLists.txt:49 (find_hexagon_sdk_root)

That will be fixed soon.

PR10227 should cure this.