Mark internal Java variables with ID_C_no_nondet_initialization

This sets the flag to be true for java::@inflight_exception and static
initializer internal variables (including clinit_already_run)

Author: svorenova

jbmc/src/java_bytecode/java_bytecode_internal_additions.cpp

@@ -51,6 +51,7 @@ void java_internal_additions(symbol_table_baset &dest)
     symbol.name = INFLIGHT_EXCEPTION_VARIABLE_NAME;
     symbol.mode = ID_java;
     symbol.type = pointer_type(empty_typet());
+    symbol.type.set(ID_C_no_nondet_initialization, true);
     symbol.value = null_pointer_exprt(to_pointer_type(symbol.type));
     symbol.is_file_local = false;
     symbol.is_static_lifetime = true;

jbmc/src/java_bytecode/java_static_initializers.cpp

@@ -91,6 +91,7 @@ static symbolt add_new_variable_symbol(
   new_symbol.pretty_name = name;
   new_symbol.base_name = name;
   new_symbol.type = type;
+  new_symbol.type.set(ID_C_no_nondet_initialization, true);
   new_symbol.value = value;
   new_symbol.is_lvalue = true;
   new_symbol.is_state_var = true;