libavif path

[totaam]

libavif was added in 5e8c135.

Problem is that the dylib id is wrong and requires tweaking after installing:

install_name_tool -id "$JHBUILD_PREFIX/lib/libavif.dylib" \
                                  "$JHBUILD_PREFIX/lib/libavif.dylib"

(somewhat similar to #19)

[totaam]

libavif was updated to version 0.11.1 in 67e9966

Still a problem.

[totaam]

Current version is 1.0.3

Based on:

• update to libjpeg-turbo 2.x #19 (comment)
• pyproject.toml xpra#4085 (comment)

I tried setting DCMAKE_INSTALL_NAME_DIR but that made no difference and cmake said:

CMake Warning:
  Manually-specified variables were not used by the project:

    DCMAKE_INSTALL_NAME_DIR

The next solution to try seems completely overkill: For libavif, since no one wrote a meson port for the WrapDB, it is "probably" possible to use meson's cmake module to configure libavif and parse the cmake debug tracing API, retrieve build definitions, and convert it to a meson AST then build it with meson. In case you're wondering, yes, that is exactly as hacky as it sounds.
I would rather add a patch to run ninja followed by our install_name_tool workaround... a single line.