native: Move virtclass override to earlier so DEPENDS is handled correctly
Currently the virtclass override is added too late to be taken into
account when DEPENDS and other variables are processed by the virtclass
extension code. This sets the overrides in a more optimal place, meaning
they are accounted for in variables like DEPENDS.
Recipes in meta-oe like libwmf-native showed the issue.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
