package_ipk: correct ipk multiline descriptions
Empty descriptions lines are set with a space following by a dot and
the multiline ones require a leading space. Also, for non-empty lines,
there is no need for formating with textwrap, so remove the logic for
the latter. The documentation for multiline description was taken from [1].
[1] https://web.archive.org/web/
20100727133051/http://handhelds.org:80/moin/moin.cgi/BuildingIpkgs
[YOCTO #10677]
Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
