VSNASM and VSYASM updates

The Visual Studio assembler integrations for both nasm and yasm have been updated to new versions (0.5 and 0.4 respectively). This updates add the following features:

• Install script can now use vswhere to detect Visual Studio installations (this helps support detection even with broken installs)
• Install script will now install to all detected Visual Studio installations at once (i.e. can install to 2015 and 2017 at once)
• Now supports Visual Studio 2019

libssh and libmfx updates

The following projects have been updated:

• libssh was updated to 0.8.6.
• libmfx was updated to 1.27.r60.

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.

Harfbuzz, libgpg-error and nettle updates

The following projects have been updated:

• Harfbuzz was updated to 2.2.0.
• libgpg-error was updated to 1.33.
• nettle was updated to 3.4.1.

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.

Harfbuzz, libgcrypt, SDL and libssh updates

The following projects have been updated:

• Harfbuzz was updated to 2.0.2 then to 2.1.0 then to 2.1.1.
• libgcrypt was updated to 1.8.4.
• libssh was updated to 0.8.5.
• SDL was updated to 2.0.9.

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.