TODO: Add two more bits
postprocess: Remove var_uuid files from yumdb

These differ each run, polluting upgrades.  James says we don't need
them anyways.postprocess: Remove var_uuid files from yumdb

These differ each run, polluting upgrades.  James says we don't need
them anyways.
postprocess: Work around SELinux issue with cross labeling

Unfortunately when composing from RHEL7 a current rawhide tree, the
PCRE version mismatch causes none of the regexps to match...

Work around this by temporarily moving the .bin files out of the way.
This is really a hack though.

The real fix is to change libselinux to check pcre_version().