[MacPorts] #65435: coreutils @9.x: fix implicit declaration warnings

[MacPorts]

#65435: coreutils @9.x: fix implicit declaration warnings
---------------------+-----------------------
 Reporter:  mascguy  |      Owner:  mascguy
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.7.2
 Keywords:           |       Port:  coreutils
---------------------+-----------------------
 Specifically:

 {{{
   re_search: found in coreutils-9.1/config.log
   re_compile_pattern: found in coreutils-9.1/config.log
   re_set_syntax: found in coreutils-9.1/config.log
   MIN: found in coreutils-9.1/config.log
   __fpending: found in coreutils-9.1/config.log
   free: found in coreutils-9.1/config.log
   strchr: found in coreutils-9.1/config.log
   re_match: found in coreutils-9.1/config.log
 }}}

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Ticket URL: <https://trac.macports.org/ticket/65435>
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