harfbuzz: corrected optional_depends on gobject-introspection=no

gobject-introspection "no" option
incorrectly set to --disable-introspection=no
when it should be --enable-introspection=no

the former causes the build to barf
ragel: adding to moonbase. Will be a depends for freshplayerplugin on its next bump.
Merge branch 'master' of github.com:lunar-linux/moonbase-other
transcode: Adding a sedit so it will compile with our ffmpeg.