Update groff to 1.20.1, add SUMMARY and LICENSE info
From OE 70bf94cd8669f549ca90581e9592d409b6e24e2e
Fixes [Yocto 879]
(From OE-Core rev: 6c5cbb73550639ec71cb9564883253dbe1c09f36)
Signed-off-by: Kang Kai <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
An investigation into undocumented variables uncovered a handful
of LIC_FILES_CHKSUM spelling errors
Signed-off-by: Darren Hart <dvhart@linux.intel.com>