Fix the `Failed to load shared library 'libglib-2.0.0.dylib' referenced
by the typelib` error by adding the common Homebrew's shared library
directory (i.e., `$(brew --prefix)/lib`) to the dyld library search path.
This ensures that all Homebrew-installed shared libraries are discoverable
via `dlopen()`-like loading mechanism. (Previously, only directory
with `libhidapi` shared library was explicitly added to search path).
Use `DYLD_FALLBACK_LIBRARY_PATH` instead of `DYLD_LIBRARY_PATH` to
register the Homebrew library directory as a fallback search path
rather than preferred/default one. In general, this should be
preferred way of modifying library search path with 3rd-party
installations, even though it probably bears no real difference in
this particular scenario.