ufbv-rewriter is really a demodulator rewriter and does not reference ufbv

so moving first the rewriter into place of other rewriters

src/ast/rewriter/CMakeLists.txt

@@ -11,6 +11,7 @@ z3_add_component(rewriter
     cached_var_subst.cpp
     char_rewriter.cpp
     datatype_rewriter.cpp
+    demodulator_rewriter.cpp
     der.cpp
     distribute_forall.cpp
     dl_rewriter.cpp