Fix bool versus bitvec 1 sort mismtach for CVC4

This fixes a sort mismatch that can occur in CVC4 where an
array of booleans is translated into an array of (_ bitvec 1)
which is then a mismatch when CVC4 expects and can handle an
Array of Bool.

Author: TGWDB

src/solvers/smt2/smt2_conv.cpp

@@ -96,6 +96,7 @@ smt2_convt::smt2_convt(
     break;
 
   case solvert::CVC4:
+    use_array_of_bool = true;
     use_as_const = true;
     break;