git: flex - Fix buildworld issue when compiling on older releases

[Matthew Dillon]

commit 8b5b70d0b9b514b2ad3e2ebff32395b29fe8b069
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Thu Sep 10 21:11:15 2020 -0700

    flex - Fix buildworld issue when compiling on older releases
    
    * Conditionalize use of reallocarray() so flex can bootstrap during
      a buildworld on an older release.

Summary of changes:
 usr.bin/flex/config.h | 5 +++++
 1 file changed, 5 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/8b5b70d0b9b514b2ad3e2ebff32395b29fe8b069


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