message: Add missing test cases in script_tests.cpp
  Summary: Some tests case were present in script_tests.json but missing from script_tests.cpp . This is fixing that error.
  Test Plan:
  make check
  Reviewers: #bitcoin_abc, schancel
  Subscribers: teamcity
diff: @@ -588,6 +588,18 @@ BOOST_AUTO_TEST_CASE(script_build)
  tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
  "BIP66 example 4, with DERSIG", SCRIPT_VERIFY_DERSIG)
  .Num(0));
  + tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
  + "BIP66 example 4, with DERSIG, non-null DER-compliant signature", SCRIPT_VERIFY_DERSIG)
  + .Push("300602010102010101"));
  + tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
  + "BIP66 example 4, with DERSIG and NULLFAIL", SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_NULLFAIL)
  + .Num(0));
  + tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
  + "BIP66 example 4, with DERSIG and NULLFAIL, "
  + "non-null DER-compliant signature",
  + SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_NULLFAIL)
  + .Push("300602010102010101")
  + .ScriptError(SCRIPT_ERR_SIG_NULLFAIL));
  tests.push_back(
  TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG, "BIP66 example 5, without DERSIG", 0)
  .Num(1)
  