Normalize coverage for `var` declarations

Add tests to mirror similar tests which were authored previously.

test/language/statements/variable/arguments-strict-list-first-init.js

+// Copyright (c) 2018 Mike Pennisi.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-variable-statement
+description: arguments as local var identifier throws SyntaxError in strict mode
+flags: [onlyStrict]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var arguments = 42, a;

test/language/statements/variable/arguments-strict-list-middle-init.js

+// Copyright (c) 2018 Mike Pennisi.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-variable-statement
+description: arguments as local var identifier throws SyntaxError in strict mode
+flags: [onlyStrict]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var a, arguments = 42, b;

test/language/statements/variable/eval-non-strict.js

+// Copyright (c) 2018 Mike Pennisi.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-variable-statement
+description: arguments as local var identifier is allowed
+flags: [noStrict]
+---*/
+
+var eval;

test/language/statements/variable/eval-strict-list-final-init.js

+// Copyright (c) 2018 Mike Pennisi.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-variable-statement
+description: eval as local var identifier throws SyntaxError in strict mode
+flags: [onlyStrict]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var a, eval = 42;

test/language/statements/variable/eval-strict-list-middle-init.js

+// Copyright (c) 2018 Mike Pennisi.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-variable-statement
+description: arguments as local var identifier throws SyntaxError in strict mode
+flags: [onlyStrict]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var a, eval = 42, b;

test/language/statements/variable/eval-strict-list-middle.js

+// Copyright (c) 2018 Mike Pennisi.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-variable-statement
+description: arguments as local var identifier throws SyntaxError in strict mode
+flags: [onlyStrict]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+var a, eval, b;