... from glib-gen-srcs.[vsprops|props].in to
glib-version-paths.[vsprops|props].in, and instead let autotools generate
glib-version-paths.[vsprops|props] rather than
glib-gen-srcs.[vsprops|props], as this will need to be referenced for
other items as well, namely generating the .pc files which will become
useful for introspection builds.
