Issue 6180 - Add a few missing ABP_TEXT() macros

compiled/filter/RegExpFilter.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 111 matching lines @@
             // Not actually an anchor, escape it
             result.append(ABP_TEXT("\\|"_str));
           }
           break;
         default:
           if (!(currChar >= ABP_TEXT('a') && currChar <= ABP_TEXT('z')) &&
               !(currChar >= ABP_TEXT('A') && currChar <= ABP_TEXT('Z')) &&
               !(currChar >= ABP_TEXT('0') && currChar <= ABP_TEXT('9')) &&
               currChar < 128)
           {
-            result.append(u'\\');
+            result.append(ABP_TEXT('\\'));
           }
           result.append(currChar);
       }
       prevChar = currChar;
     }
     return result;
   }
 
   void NormalizeWhitespace(DependentString& text)
   {
@@ skipping 247 matching lines @@
     return false;
   }
 
   if (!mData.RegExpParsingDone())
   {
     const OwnedString pattern(mData.GetRegExpSource(mText));
     mData.SetRegExp(GenerateRegExp(RegExpFromSource(pattern), mData.mMatchCase));
   }
   return TestRegExp(mData.mRegexpId, location);
 }