Provide debugging information for programs

From Andrew Hughes on build-dev:

The following webrevs:

Root: http://cr.openjdk.java.net/~andrew/build/debugging/webrev.02/
JDK: http://cr.openjdk.java.net/~andrew/build/debugging/webrev.03/

1. Enable debugging on programs for OpenJDK builds
(unclear why this is disabled; the comment says "Programs don't get the debug symbols added in the old build. It's not clear if this is intentional" but all our builds of 6 & 7 have debug info, making this a regression)
2. Turn on debugging symbols for unpack200 and jexec which seem to have been missed.

Ok? If so, can I have a bug ID for this, please?

Thanks,
-- Andrew :)