[eclipse-pmc] Bug fixes for 3.3.2

[DJ Houghton <DJ_Houghton@xxxxxxxxxx>]

As discussed in the Eclipse Architecture call today, here are the remaining
bugs in Core that are open for consideration for Eclipse 3.3.2.

https://bugs.eclipse.org/bugs/show_bug.cgi?id=215369
- when the user is running with --lanucher.supressErrors (as is the default
in many Eclipse-base products) and they don't have Java in their path, then
Eclipse just dies. (because the error messages are suppressed ;-)
- code change is to print errors to stderr in this case

https://bugs.eclipse.org/bugs/show_bug.cgi?id=215519
- there are 2 ways to import preferences, one automatically saves them to
disk when the operation completes and the other doesn't.
- if a user imports preferences (via method #2) and then crashes, their
preferences will not be saved.
- problem has been reported by Eclipse-based products
- low risk fix