Update release-trueos.sh
A few cleanup operations for the ISO:
* Exclude the "-profile" base packages from being *installed* on the ISO.
* Add a "prune-dist-packages" set of package lists which will be used for removing dist files from the ISO.
* Each entry is treated as a basic regex (case-insensitive)
* This will remove the matched files, but may leave dependencies of those package files behind.
* Each entry automatically ends in "*.txz" so an entry can have the form "packagename" or "packagename-" instead of "packagename-*.txz"
UnifiedSplitRaw
