Rename tests for clarity

test/language/directive-prologue/func-decl-final-runtime.js

.../directive-prologue/func-decl-inside-func-decl-runtime.js

...anguage/directive-prologue/func-decl-not-first-runtime.js

test/language/directive-prologue/func-decl-runtime.js

test/language/directive-prologue/func-expr-final-runtime.js

.../directive-prologue/func-expr-inside-func-decl-runtime.js

.../language/directive-prologue/func-expr-no-semi-runtime.js

...anguage/directive-prologue/func-expr-not-first-runtime.js

test/language/directive-prologue/func-expr-runtime.js

.../directive-prologue/get-accsr-inside-func-expr-runtime.js

...anguage/directive-prologue/get-accsr-not-first-runtime.js

test/language/directive-prologue/get-accsr-runtime.js

.../directive-prologue/set-accsr-inside-func-expr-runtime.js

...anguage/directive-prologue/set-accsr-not-first-runtime.js