Add support for generating Microsoft Visual Studio 2019 project files.

* build/generator/gen_win_dependencies.py
  (parse_options): Add magic numbers for Visual Studio 2019.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1856397 13f79535-47bb-0310-9956-ffa450edef68
1 file changed