[ruby-cvs:67482] k0kubun:r60301 (trunk): driver.rb: allow executing driver.rb directly

[k0kubun at ruby-lang.org]

k0kubun	2017-10-22 00:45:32 +0900 (Sun, 22 Oct 2017)

  New Revision: 60301

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=60301

  Log:
    driver.rb: allow executing driver.rb directly

  Modified files:
    trunk/benchmark/driver.rb