hddtemp: add from OE-Classic and update

hddtemp is unmaintained upstream so we have to do a bit of patching. All
patches sourced from Debian/Fedora, except hddtemp-no-nls-support.patch
which came from OE-Classic.

Other improvements:
* Add initscript from Debian
* Make LICENSE more accurate
* Add LIC_FILES_CHKSUM
* inherit gettext to avoid error during configure

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>