Bug 18028 removed the install_misc directory but
install_misc/UpgradeBackup.pm was still used by the 'upgrade' rule of
make.
Other files from install_misc were useless to it may be better not to
reintroduce this directory with only 1 file.
Test plan:
`make`
`sudo make install`
`make upgrade`
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
