Autogen: Let AUTORCC generate output for all configurations
For multi configuration generators let AUTORCC generate
the rcc output for all configurations. This is a workaround
for the incomplete $<CONFIG>
support in the DEPENDS and OUTPUT
clauses of a custom_command/custom_target. Since we can't depend
on the per-config rcc output file we somehow must ensure the successful
rcc build for one configuration doesn't shadow the need to rcc rebuild
for a second configuration.