[ruby-cvs:67480] k0kubun:r60299 (trunk): driver.rb: add option to specify target with rbenv

[k0kubun at ruby-lang.org]

k0kubun	2017-10-22 00:39:35 +0900 (Sun, 22 Oct 2017)

  New Revision: 60299

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=60299

  Log:
    driver.rb: add option to specify target with rbenv
    
    [close GH-1724]

  Modified files:
    trunk/benchmark/driver.rb