Description of problem:
MOZILLA_FIVE_HOME is not set, so the embedded browser widget fails to start

Version-Release number of selected component (if applicable):
eclipse-platform-3.1.0_fc-0.M6.18

How reproducible:
Always

Steps to Reproduce:
1. In eclipse, create a file called "test.html"
  
Actual results:
Eclipse says: "Embedded browser not available" and offers to "open file using
the system editor". The detailed error message is:

org.eclipse.swt.SWTError: No more handles [Unknown mozilla path
(MOZILLA_FIVE_HOME not set)]

Expected results:
Should use mozilla or firefox for the embedded browser widget

Additional info:
I am currently running eclipse on Sun JDK 1.5, but I don't think that should
make a difference, because MOZILLA_FIVE_HOME would not be set whichever VM you use.

Suggested fix: Add the following to /usr/bin/eclipse:

if [ -z "$MOZILLA_FIVE_HOME" ]; then
  XPCOM=$(ls -t /usr/lib/{mozilla,firefox}-*/libxpcom.so|head -n1)
  export MOZILLA_FIVE_HOME=$(dirname $XPCOM)
fi
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$MOZILLA_FIVE_HOME