Complete test coverage for labelled fn decls

Ensure that early errors restricting labelled function declarations
within WithStatement and IfStatement are honored. Rename existing tests
to match the specification's spelling.

test/language/statements/if/labelled-fn-stmt-first.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-if-statement-static-semantics-early-errors
+es6id: 13.6.1
+description: >
+  A labelled function declaration is never permitted in the first of two
+  Statement positions
+info: |
+  IfStatement :
+
+    if ( Expression ) Statement else Statement
+    if ( Expression ) Statement
+
+  - It is a Syntax Error if IsLabelledFunction(Statement) is true.
+
+  NOTE It is only necessary to apply this rule if the extension specified in
+       B.3.2 is implemented.
+
+  In the absence of Annex B.3.2, a SyntaxError should be produced due to the
+  labelled function declaration itself.
+negative: SyntaxError
+---*/
+
+if (false) label1: label2: function test262() {} else ;

test/language/statements/if/labelled-fn-stmt-lone.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-if-statement-static-semantics-early-errors
+es6id: 13.6.1
+description: >
+  A labelled function declaration is never permitted in the sole Statement
+  position
+info: |
+  IfStatement :
+
+    if ( Expression ) Statement else Statement
+    if ( Expression ) Statement
+
+  - It is a Syntax Error if IsLabelledFunction(Statement) is true.
+
+  NOTE It is only necessary to apply this rule if the extension specified in
+       B.3.2 is implemented.
+
+  In the absence of Annex B.3.2, a SyntaxError should be produced due to the
+  labelled function declaration itself.
+negative: SyntaxError
+---*/
+
+if (false) label1: label2: function test262() {}

test/language/statements/if/labelled-fn-stmt-second.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-if-statement-static-semantics-early-errors
+es6id: 13.6.1
+description: >
+  A labelled function declaration is never permitted in the second of two
+  Statement positions
+info: |
+  IfStatement :
+
+    if ( Expression ) Statement else Statement
+    if ( Expression ) Statement
+
+  - It is a Syntax Error if IsLabelledFunction(Statement) is true.
+
+  NOTE It is only necessary to apply this rule if the extension specified in
+       B.3.2 is implemented.
+
+  In the absence of Annex B.3.2, a SyntaxError should be produced due to the
+  labelled function declaration itself.
+negative: SyntaxError
+---*/
+
+if (true) ; else label1: label2: function test262() {}

test/language/statements/with/labelled-fn-stmt.js

+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-with-statement-static-semantics-early-errors
+es6id: 13.11.1
+description:
+  A labelled function declaration is never permitted in the Statement position
+info: |
+  WithStatementa: with ( Expression ) Statement
+
+  [...]
+  - It is a Syntax Error if IsLabelledFunction(Statement) is true.
+
+  NOTE It is only necessary to apply the second rule if the extension specified
+       in B.3.2 is implemented.
+
+  In the absence of Annex B.3.2, a SyntaxError should be produced due to the
+  labelled function declaration itself.
+negative: SyntaxError
+---*/
+
+with ({}) label1: label2: function test262() {}