CSharp: fix generation fail in environment except English
When I generate C# project, generation failed by Visual Studio(Japanese version).
Environment:
Windows 10 Pro version 1703 build 15063.674
Visual Studio 2017 Community Version 15.4.1 (Japanease version)
cmake-3.10.0-rc4-win64-x64.msi
When CMakeDetermineCSharpCompiler.cmake acquires version number of csc.exe, and look for "Version".
For example, in the case of Japanese, It cannot acquire version number because it is displayed as follows.
I was able to revise it by "csc.exe /help /preferreduilang:en-US" in CMakeDetermineCSharpCompiler.cmake.
This request is reflection of @guttally's contribution. His GitHub ID is https://github.com/guttally .
Thank you and I'm sorry my poor English.
Topic-rename: csharp-version-english