test review of EVA plugin

tests/value/sign_of_bitfiled_int.c

tests/value/simplify_cfg.i

tests/value/split_return.i

tests/value/ulongvslonglong.i

tests/value/uninit_callstack.i

tests/value/unknown_sizeof.i

tests/value/use_spec.i

tests/value/volatile2.i

tests/value/widen_overflow.i