Test phony dependencies

build_tests/typical/phonies.rb

@@ -0,0 +1,15 @@
+class Custom < Rscons::Builder
+  def run(options)
+    print_run_message("#{name} #{target}", nil)
+    true
+  end
+end
+
+env do |env|
+  env.add_builder(Custom)
+  env.Custom("t3", :phony1)
+  env.Custom(:phony1, "t2")
+  env.Custom("t2", :phony2)
+  env.Custom(:phony2, "t1")
+  env.Custom("t1", [])
+end