Report failures back from debSystem::AddStatusFiles

Failing to properly create the status file class should be reported back
to the caller so it can proceed accordingly instead of proceeding into
more failures.

This gives us:
E: flAbsPath on /var/lib/dpkg/status failed - realpath (2: No such file or directory)
E: The package lists or status file could not be parsed or opened.
instead of:
E: flAbsPath on /var/lib/dpkg/status failed - realpath (2: No such file or directory)
E: Could not open file  - open (2: No such file or directory)
E: Problem opening
E: The package lists or status file could not be parsed or opened.
and valgrind reporting actions on uninitialised values.

0 files changed, 0 insertions, 0 deletions