Fix some generators feature flags (#1933)

test/built-ins/Function/prototype/toString/proxy-async-method-definition.js

@@ -14,7 +14,7 @@ info: |
   NativeFunction:
     function IdentifierName_opt ( FormalParameters ) { [ native code ] }
 
-features: [async-functions, generators, Proxy]
+features: [async-functions, Proxy]
 includes: [nativeFunctionMatcher.js]
 ---*/
 

test/built-ins/Object/prototype/toString/proxy-function.js

@@ -14,7 +14,7 @@ info: |
     a. Set the [[Call]] internal method of P as specified in 9.5.12.
   [...]
 
-features: [Proxy, Symbol.toStringTag]
+features: [generators, Proxy, Symbol.toStringTag]
 ---*/
 
 var functionProxy = new Proxy(function() {}, {});

test/built-ins/TypedArrayConstructors/ctors/object-arg/iterating-throws.js

@@ -16,7 +16,7 @@ info: |
   4. Let arrayLike be ? IterableToArrayLike(object).
   ...
 includes: [testTypedArray.js]
-features: [TypedArray]
+features: [generators, TypedArray]
 ---*/
 
 testWithTypedArrayConstructors(function(TA) {

test/harness/isConstructor.js

@@ -8,7 +8,7 @@ description: >
       isConstructor
 
 includes: [isConstructor.js]
-features: [Reflect.construct]
+features: [generators, Reflect.construct]
 ---*/
 
 assert.sameValue(typeof isConstructor, "function");

test/language/expressions/await/for-await-of-interleaved.js

@@ -8,7 +8,7 @@ description: >
   for-await-of iteration and builtin Promises are properly interleaved,
   meaning await in for-of loop takes only 1 tick on the microtask queue.
 flags: [async]
-features: [async-functions, async-iteration]
+features: [async-functions, async-iteration, generators]
 includes: [compareArray.js]
 ---*/