add fd solver for finite domain queries

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

contrib/cmake/src/ast/rewriter/CMakeLists.txt

@@ -12,6 +12,7 @@ z3_add_component(rewriter
     expr_replacer.cpp
     expr_safe_replace.cpp
     factor_rewriter.cpp
+    fd_rewriter.cpp
     fpa_rewriter.cpp
     label_rewriter.cpp
     mk_simplified_app.cpp

contrib/cmake/src/tactic/portfolio/CMakeLists.txt

@@ -1,6 +1,7 @@
 z3_add_component(portfolio
   SOURCES
     default_tactic.cpp
+    fd_solver.cpp
     smt_strategic_solver.cpp
   COMPONENT_DEPENDENCIES
     aig_tactic