C++: Break on newline when lexing char/string literals

Actually this behavior was already in the Lexer for regular string
literals (although erroneously not for wide ones) and was lost
in the recent commit 23c637c4f6.

Change-Id: I36609038ce22dc6389e9da5b078f7bf7f6c031be
Reviewed-by: hjk <qthjk@ovi.com>

src/libs/3rdparty/cplusplus/Lexer.cpp

@@ -649,12 +649,13 @@ void Lexer::scanUntilQuote(Token *tok, unsigned char quote)
     assert(quote == '"' || quote == '\'');
 
     const char *yytext = _currentChar;
-    while (_yychar && _yychar != quote) {
+    while (_yychar
+           && _yychar != quote
+           && _yychar != '\n') {
         if (_yychar != '\\')
             yyinp();
         else {
             yyinp(); // skip `\\'
-
             if (_yychar)
                 yyinp();
         }