String.prototype.trimEnd,trimStart: add feature (per new convention)

test/built-ins/String/prototype/trimStart/this-value-object-valueof-returns-object-err.js

@@ -40,7 +40,7 @@ info: |
         i. Let result be ? Call(method, O).
         ii. If Type(result) is not Object, return result.
     6. Throw a TypeError exception.
-features: [string-trimming, Symbol.toPrimitive]
+features: [string-trimming, String.prototype.trimStart, Symbol.toPrimitive]
 ---*/
 
 

test/built-ins/String/prototype/trimStart/this-value-symbol-typeerror.js

@@ -11,7 +11,7 @@ info: |
   ToString ( argument )
   Argument Type: Symbol
   Result: Throw a TypeError exception
-features: [string-trimming]
+features: [string-trimming, String.prototype.trimStart]
 ---*/
 
 var trimStart = String.prototype.trimStart;

test/built-ins/String/prototype/trimStart/this-value-whitespace.js

@@ -16,7 +16,7 @@ info: |
   “Zs”, code unit sequences are interpreted as UTF-16 encoded code point
   sequences as specified in 6.1.4.
 
-features: [string-trimming]
+features: [string-trimming, String.prototype.trimStart]
 ---*/
 
 var trimStart = String.prototype.trimStart;