[ruby-cvs:72104] naruse:r65004 (trunk): Show VS*COMNTOOLS environment variable on appveyor

[naruse at ruby-lang.org]

naruse	2018-10-12 08:21:11 +0900 (Fri, 12 Oct 2018)

  New Revision: 65004

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=65004

  Log:
    Show VS*COMNTOOLS environment variable on appveyor

  Modified files:
    trunk/appveyor.yml