Relicensed to just GPLv3+, update LICENSE and checksums.
The build dependency for flex should be flex-native.
libmath.h is missing from the tarball (it was present in 1.06) and the
generation rules are not cross-friendly, so delete the rules and copy in a
pre-generated libmath.h.
Remove fix-segment-fault.patch as the fixes are now upstream.
Add PACKAGECONFIG for readline and libedit, defaulting to readline.
Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
