[MacPorts] #44526: xxdiff: update to 4.0

[MacPorts]

#44526: xxdiff: update to 4.0
--------------------------+--------------------------------
  Reporter:  rjvbertin@…  |      Owner:  macports-tickets@…
      Type:  update       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  xxdiff       |
--------------------------+--------------------------------

Comment (by egall@…):

 Replying to [comment:8 rjvbertin@…]:
 > Building the package on Linux, I discovered that resParser.y must be
 adapted for use with bison 3.0x . I don't know if/when MacPorts will
 upgrade bison to the v3 series, but when that happens a patch must be
 found. I am not familiar with these tools, sadly, or I'd do it right now.

 The ticket for the update to bison3 is #41600 [[BR]]
 The ticket that resulted from the last time we tried updating to bison3 is
 #39910

-- 
Ticket URL: <https://trac.macports.org/ticket/44526#comment:9>
MacPorts <http://www.macports.org/>
Ports system for OS X