Update lang-swift.js (#487)

* associatedtype: https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Generics.html
* fileprivate|open: https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/AccessControl.html
* Self: https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Declarations.html
* #column|#file|#function: https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Expressions.html
* #colorLiteral|#fileLiteral|#imageLiteral|#selector|#sourceLocation : https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/LexicalStructure.html#//apple_ref/doc/uid/TP40014097-CH30-ID410

Author: Coeur

src/lang-swift.js

@@ -48,7 +48,7 @@ PR['registerLangHandler'](
           //some other literals
           [PR['PR_LITERAL'],              /^(?:true|false|nil)\b/, null],
           //keywords
-          [PR['PR_KEYWORD'],              /^\b(?:__COLUMN__|__FILE__|__FUNCTION__|__LINE__|#available|#else|#elseif|#endif|#if|#line|arch|arm|arm64|associativity|as|break|case|catch|class|continue|convenience|default|defer|deinit|didSet|do|dynamic|dynamicType|else|enum|extension|fallthrough|final|for|func|get|guard|import|indirect|infix|init|inout|internal|i386|if|in|iOS|iOSApplicationExtension|is|lazy|left|let|mutating|none|nonmutating|operator|optional|OSX|OSXApplicationExtension|override|postfix|precedence|prefix|private|protocol|Protocol|public|required|rethrows|return|right|safe|self|set|static|struct|subscript|super|switch|throw|try|Type|typealias|unowned|unsafe|var|weak|watchOS|while|willSet|x86_64)\b/, null],
+          [PR['PR_KEYWORD'],              /^\b(?:__COLUMN__|__FILE__|__FUNCTION__|__LINE__|#available|#colorLiteral|#column|#else|#elseif|#endif|#file|#fileLiteral|#function|#if|#imageLiteral|#line|#selector|#sourceLocation|arch|arm|arm64|associatedtype|associativity|as|break|case|catch|class|continue|convenience|default|defer|deinit|didSet|do|dynamic|dynamicType|else|enum|extension|fallthrough|fileprivate|final|for|func|get|guard|import|indirect|infix|init|inout|internal|i386|if|in|iOS|iOSApplicationExtension|is|lazy|left|let|mutating|none|nonmutating|open|operator|optional|OSX|OSXApplicationExtension|override|postfix|precedence|prefix|private|protocol|Protocol|public|required|rethrows|return|right|safe|Self|self|set|static|struct|subscript|super|switch|throw|try|Type|typealias|unowned|unsafe|var|weak|watchOS|while|willSet|x86_64)\b/, null],
           //double slash comments
           [PR['PR_COMMENT'],              /^\/\/.*?[\n\r]/, null],
           //slash star comments