Add support for building on Apple Silicon by fixing the rpath being passed to link args
This patch allows HomeBrew to be able to build libgit2-glib on Apple Silicon using https://github.com/Homebrew/homebrew-core/blob/master/Formula/libgit2-glib.rb
This patch allows HomeBrew to be able to build libgit2-glib on Apple Silicon using https://github.com/Homebrew/homebrew-core/blob/master/Formula/libgit2-glib.rb