The `sudo` was missing from `make install` which prevented installation
if build is performed, as it should be, by an unpriviliged user.
Signed-off-by: Alexander Amelkin <alexander@amelkin.msk.ru>
Add some documenation on packages to install on Ubuntu 16.04 and
Fedora 31 before building the software.
This will make it easier for people who are building ipmitool as they
won't need to figure out all the package dependencies on their own.
