[CMake] Visual Studio ARM generator

[Robert Bielik]

Hi,

With CMake 3.12.3, trying to use generator "Visual Studio 15 2017 ARM" I get: 

The C compiler identification is unknown
The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:6 (project):
  No CMAKE_C_COMPILER could be found.
CMake Error at CMakeLists.txt:6 (project):
  No CMAKE_CXX_COMPILER could be found.

The VC++ mobile development tools (Android,iOS) are installed. Is this supposed to work ?

Regards
/Robert