LD64Dependency: adjust initializer signature

The method signature of Dependency changed in
1fdf69b90382c43493a5f62f0020729289db6c70, however LD64Dependency was
missed in the update. This resulted in failures in merge_repeats(),
which creates many dependency objects using all three arguments.
libpng 1.6.10
ttfautohint 1.00
gdk-pixbuf: update 2.30.4 bottle.