FFmpeg 4.3.2

What's Changed

• Build arm64 on macos by @jlaine in #17
• Rework code for determining platform by @jlaine in #18

Full Changelog: 4.3.2-1...4.3.2-2

FFmpeg 4.3.2

What's Changed

Full Changelog: 4.3.1-1...4.3.2-1

FFmpeg 4.3.1

4.3.1-1

Update FFmpeg to 4.3.1, switch back to tar.gz again

FFmpeg 4.2.2

4.2.2-7

Enable gmp and gnutls

FFmpeg 4.2.2

Build gettext ourselves

This avoids picking up homebrew's libintl on OS X which may not be built
for the target OS X version.

FFmpeg 4.2.2

4.2.2-5

Ensure binaries are compatible with OS X 10.9

FFmpeg 4.2.2

4.2.2-4

Enable libxvid

FFmpeg 4.2.2

4.2.2-3

Inspect Mac OS shared libraries

FFmpeg 4.2.2

Use CMAKE_INSTALL_RPATH_USE_LINK_PATH for OS X build of x265

For some reason on OS X the .dylib is not found at runtime, try to use
CMAKE_INSTALL_RPATH_USE_LINK_PATH.

FFmpeg 4.2.2

4.2.2-1

Fix Windows tarball generation