pygobject links against Python dylib on macOS

I am currently updating the Homebrew formula for pygobject3 and saw that the new meson build system is explicitly linking against the python dylib, which is over-linking and potentially dangerous.

I managed to fix this by removing the reference to the dylib in build.ninja after meson is run, but ideally this should be done in the meson script (or perhaps meson itself...)

I am guessing that the same problem will occur on Linux as well...