XXX Rearchitect and replace interrupt distribution

@@ -192,10 +192,11 @@
                 rusagesys.o     \
                 gid.o           \
                 groups.o        \
                 grow.o          \
                 hat_refmod.o    \
+                interrupt_balancer.o    \
                 id32.o          \
                 id_space.o      \
                 inet_ntop.o     \
                 instance.o      \
                 ioctl.o         \