jython2.7 homebrew patch

diff -u a/libexec/bin/jython b/libexec/bin/jython
--- a/libexec/bin/jython  2013-09-03 21:37:06.000000000 -0700
+++ b/libexec/bin/jython	2013-09-03 21:44:39.000000000 -0700
@@ -25,19 +25,8 @@
 ## resolve links - $0 may be a link to home
 PRG=$0

-while [ -h "$PRG" ] ; do
-  ls=`ls -ld "$PRG"`
-  link=`expr "$ls" : '.*-> \(.*\)$'`
-  if expr "$link" : '.*/.*' > /dev/null; then
-    if expr "$link" : '/' > /dev/null; then
-      PRG="$link"
-    else
-      PRG="`dirname ${PRG}`/${link}"
-    fi
-  else
-    PRG="`dirname $PRG`/$link"
-  fi
-done
+PRG=$(grealpath $0)
+JYTHON_HOME=$(dirname $(dirname $PRG))

 if [ -z "$JAVA_HOME" ] ; then
   JAVA_CMD=(java)
@@ -48,26 +37,6 @@
   JAVA_CMD=("$JAVA_HOME/bin/java")
 fi

-# try to dynamically determine jython home
-# (this script typically resides in jython home, or in the /bin subdirectory)
-if [ -z "$JYTHON_HOME" ] ; then
-  if [ "$PRG" = "./jython" ] ; then
-    # current dir is the script dir
-    JYTHON_HOME_1=`pwd`
-  else
-    # current dir is not the script dir
-    JYTHON_HOME_1=`dirname "$PRG"`
-  fi
-  if [ -f "$JYTHON_HOME_1"/jython.jar -o -f "$JYTHON_HOME_1"/jython-dev.jar ] ; then
-    JYTHON_HOME="$JYTHON_HOME_1"
-  else
-    JYTHON_HOME=`dirname "$JYTHON_HOME_1"`
-  fi
-  if [ ! -f "$JYTHON_HOME"/jython.jar -a ! -f "$JYTHON_HOME"/jython-dev.jar ] ; then
-    JYTHON_HOME="$JYTHON_HOME_FALLBACK"
-  fi
-fi
-
 if [ -z "$JYTHON_OPTS" ] ; then
   JYTHON_OPTS=""
 fi