ports/170275: [bsd.options.desc.mk] add PGO option

[Jan Beich]

>Number:         170275
>Category:       ports
>Synopsis:       [bsd.options.desc.mk] add PGO description
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 30 12:20:11 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Jan Beich
>Release:        FreeBSD 10.0-CURRENT amd64
>Organization:
>Environment:
>Description:
PGO is currently defined in

  mail/crm114/Makefile
  multimedia/x264-devel/Makefile
  multimedia/x264/Makefile
  textproc/libtre/Makefile
  www/firefox/Makefile.options

while the following ports already use optionsNG:

  multimedia/x264
  www/firefox
  www/firefox-esr

>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: