Object factory: support global allocation

This already supported choosing between allocation on the stack and
the heap; this adds global object creation as a new possibility.
java_static_lifetime_init is switched to use global allocation, as
this reflects the true lifetime of static fields.

Author: smowton

src/goto-programs/convert_nondet.cpp

@@ -85,7 +85,7 @@ static goto_programt::targett insert_nondet_init_code(
     symbol_table,
     source_loc,
     true,
-    true,
+    allocation_typet::DYNAMIC,
     !nullable,
     max_nondet_array_length,
     update_in_placet::NO_UPDATE_IN_PLACE);

src/java_bytecode/java_bytecode_instrument.cpp

@@ -113,6 +113,7 @@ codet java_bytecode_instrumentt::throw_exception(
       false,
       symbol_table,
       max_array_length,
+      allocation_typet::LOCAL,
       original_loc);
   }
   else

src/java_bytecode/java_entry_point.cpp

@@ -118,6 +118,7 @@ void java_static_lifetime_init(
           allow_null,
           symbol_table,
           max_nondet_array_length,
+          allocation_typet::GLOBAL,
           source_location);
         code_assignt assignment(sym.symbol_expr(), newsym);
         code_block.add(assignment);
@@ -180,6 +181,7 @@ exprt::operandst java_build_arguments(
         allow_null,
         symbol_table,
         max_nondet_array_length,
+        allocation_typet::LOCAL,
         function.location);
 
     // record as an input