test: Add rr_arb_tree from common_cells
// RUN: moore %s -e foo -I ../third-party/common_cells/include ../third-party/common_cells/src/*.sv
module foo;
+ rr_arb_tree #(.NumIn(4)) i0 ();
stream_delay i0 ();
stream_demux #(.N_OUP(4)) i0 ();
endmodule
