[MacPorts] #55198: ffmpeg configure fails on 10.9.5

[MacPorts]

#55198: ffmpeg configure fails on 10.9.5
-----------------------+--------------------
 Reporter:  fhgwright  |      Owner:
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:
 Keywords:             |       Port:  ffmpeg
-----------------------+--------------------
 The ostensible error is:
 {{{
 ERROR: gnutls not found using pkg-config
 }}}
 But that appears to be bogus:
 {{{
 MacPro:~ fw$ pkg-config --libs gnutls
 -L/opt/local/lib -lgnutls
 }}}
 The real error may be:
 {{{
 ld: cannot link directly with
 /System/Library/Frameworks//CoreImage.framework/CoreImage.  Link against
 the umbrella framework 'QuartzCore.framework' instead. for architecture
 x86_64
 }}}
 Attaching both main.log and config.log

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Ticket URL: <https://trac.macports.org/ticket/55198>
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