meson: Maintain macOS ABI compatibility
Need to use the correct dylib versioning.
Fixes:
dyld: Library not loaded: /Library/Frameworks/GStreamer.framework/Versions/1.0/lib/liborc-0.4.0.dylib
Referenced from: /Library/Frameworks/GStreamer.framework/Versions/1.0/lib/libgstvideo-1.0.0.dylib
Reason: Incompatible library version: libgstvideo-1.0.0.dylib requires version 29.0.0 or later, but liborc-0.4.0.dylib provides version 0.0.0