[ruby-cvs:68763] naruse:r61582 (ruby_2_5): merge revision(s) 61500: [Backport #14248]

[naruse at ruby-lang.org]

naruse	2018-01-04 03:12:16 +0900 (Thu, 04 Jan 2018)

  New Revision: 61582

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61582

  Log:
    merge revision(s) 61500: [Backport #14248]
    
    fix fd mask detection on os x
    
    This was broken in r59440 (3215b27a9abd8de793cf517f32d8901fd421eb1c)
    [Bug #14248]
    
    From: Stefan Kaes <skaes at railsexpress.de>

  Modified directories:
    branches/ruby_2_5/
  Modified files:
    branches/ruby_2_5/configure.ac
    branches/ruby_2_5/version.h