[MacPorts] #44588: libpurple: add perl dependency

[MacPorts]

#44588: libpurple: add perl dependency
--------------------------------+--------------------------------
 Reporter:  ionic@…             |      Owner:  macports-tickets@…
     Type:  defect              |     Status:  new
 Priority:  Normal              |  Milestone:
Component:  ports               |    Version:
 Keywords:  haspatch tracemode  |       Port:  libpurple
--------------------------------+--------------------------------
 Both `libpurple` and `pidgin` can be built with `perl` support, providing
 a means of scripting of the protocol/networking or UI portion (c.f.
 [https://developer.pidgin.im/doxygen/dev2.x.y/html/perl-howto.html the
 pidgin developer documentation]).

 Perl support is currently enabled for `pidgin`, but not `libpurple`.

 The `configure` script bails out if `perl` was not explicitly disabled but
 unavailable, leading to a build error in `trace mode`.

 `devans` is in favor of unconditionally enabling Perl support. I am
 backing this decision.

 This patch moves `perl5.16` to a common dependency of both `pidgin` and
 `libpurple`.

 Revbump on libpurple to account for that change, even for users not using
 `trace mode`, as the possibility of users only installing `libpurple` but
 not `pidgin` exists and those might be missing `perl5.16`.

-- 
Ticket URL: <https://trac.macports.org/ticket/44588>
MacPorts <http://www.macports.org/>
Ports system for OS X