[ruby-cvs:72994] samuel:r65870 (trunk): Fix configure.ac typo.

[samuel at ruby-lang.org]

samuel	2018-11-20 19:17:52 +0900 (Tue, 20 Nov 2018)

  New Revision: 65870

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=65870

  Log:
    Fix configure.ac typo.

  Modified files:
    trunk/configure.ac