gio: Also support modules built with MSVC
gio: Also support modules built with MSVC

GIO modules built with MSVC do not begin with 'lib', but they can
begin with 'gio'. Without this, you can only load GIO modules built
with MSVC that are `name.dll`, not `gioname.dll`.

endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib