[ruby-cvs:67334] naruse:r60153: add tag v2_5_0_preview1

[naruse at ruby-lang.org]

naruse	2017-10-10 18:24:07 +0900 (Tue, 10 Oct 2017)

  New Revision: 60153

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=60153

  Log:
    add tag v2_5_0_preview1

  Added directories:
    tags/v2_5_0_preview1/