Harfbuzz, libmfx, x265, GnuTLS and libgpg-error updates

The following projects have been updated:

• ffmpeg was updated to 4.3.r98065.
• Harfbuzz was updated to 2.6.7.
• libmfx was updated to 1.32.r79.
• x265 was updated to 3.4.
• GnuTLS was updated to 3.6.13 then to 3.6.14.
• libgpg-error was updated to 1.38.

Any projects that have a dependency that was updated has also been updated to build with the latest versions of the new libraries as well.