Debugger: Split DebuggerEncoding enum

... into a string specifying a kind of encoding (utf8, latin1),
an optional bytesize (2-byte integers, 4-byte integers) and a
flag whether the displayed value should get "..." around it.

Scales better than adding an enum value for each new combination.

Change-Id: Iffcb1e2f148f12da96e165559a976bd34026c649
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>

src/plugins/debugger/gdb/gdbengine.cpp

@@ -3387,8 +3387,7 @@ void GdbEngine::handleThreadNames(const DebuggerResponse &response)
         foreach (const GdbMi &name, names.children()) {
             ThreadData thread;
             thread.id = ThreadId(name["id"].toInt());
-            thread.name = decodeData(name["value"].data(),
-                debuggerEncoding(name["valueencoded"].data()));
+            thread.name = decodeData(name["value"].data(), name["valueencoded"].data());
             handler->updateThread(thread);
         }
         updateViews();