Avoid char literals in auto-generated AppConfig.h files

extras/Projucer/Source/Project Saving/jucer_ProjectSaver.cpp

@@ -56,7 +56,14 @@ namespace
 
     inline String valueToCharLiteral (const var& v)
     {
-        return CppTokeniserFunctions::addEscapeChars (v.toString().trim().substring (0, 4)).quoted ('\'');
+        String fourCharCode = v.toString().trim().substring (0, 4);
+        uint32 hexRepresentation = 0;
+
+        for (int i = 0; i < 4; ++i)
+            hexRepresentation = (hexRepresentation << 8U)
+                             |  (static_cast<unsigned int> (fourCharCode[i]) & 0xffU);
+
+        return String ("0x") + String::toHexString (static_cast<int> (hexRepresentation));
     }
 }