[MacPorts] #26030: pkg.m4 underquoting with autoconf-2.66+

[MacPorts]

#26030: pkg.m4 underquoting with autoconf-2.66+
------------------------------+---------------------------------------------
 Reporter:  ram@…             |       Owner:  ryandesign@…           
     Type:  defect            |      Status:  new                    
 Priority:  Normal            |   Milestone:                         
Component:  ports             |     Version:                         
 Keywords:                    |        Port:  pkg-config             
------------------------------+---------------------------------------------
 autoconf-2.66+ exposes an apparent underquoting bug in pkg.m4 that was
 causing some ports (such as xorg-libXp) to fail with errors of the form:

 {{{
 configure:12439: error: possibly undefined macro: AS_MESSAGE_LOG_FDdnl
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
 }}}

 The attached patches add the appropriate quoting that fixes these errors.

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Ticket URL: <http://trac.macports.org/ticket/26030>
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