hg: bsd-port/bsd-port/corba: . Allow the base location for X11 to be overridden, but continue to default

[glewis at eyesbeyond.com]

Changeset: 251ac9a519c2
Author:    glewis at misty.eyesbeyond.com
Date:      2008-10-08 21:47 -0700
URL:       http://hg.openjdk.java.net/bsd-port/bsd-port/corba/rev/251ac9a519c2

. Allow the base location for X11 to be overridden, but continue to default
  to /usr/X11R6.

! make/common/Defs-bsd.gmk
! make/common/Defs-linux.gmk
! make/common/Defs.gmk