Debugger: Add an option to import plain gdb pretty printers

This enables the use "official gdb"-styly pretty printers from
within Creator. In case there are both variants, Creator-style
pretty printers are preferred.

Change-Id: Iaa178d922dae4eaa1943e9d5b960a666f80fe4db
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/debugger/gdb/gdbengine.cpp

@@ -262,6 +262,7 @@ GdbEngine::GdbEngine(const DebuggerStartParameters &startParameters)
     m_disassembleUsesComma = false;
     m_terminalTrap = startParameters.useTerminal;
     m_fullStartDone = false;
+    m_systemDumpersLoaded = false;
     m_forceAsyncModel = false;
     m_pythonAttemptedToLoad = false;
 
@@ -1606,6 +1607,12 @@ void GdbEngine::handleStop1(const GdbMi &data)
     else
         m_resultVarName.clear();
 
+    if (!m_systemDumpersLoaded) {
+        m_systemDumpersLoaded = true;
+        if (debuggerCore()->boolSetting(LoadGdbDumpers))
+            postCommand("importPlainDumpers");
+    }
+
     bool initHelpers = m_debuggingHelperState == DebuggingHelperUninitialized
                        || m_debuggingHelperState == DebuggingHelperLoadTried;
     // Don't load helpers on stops triggered by signals unless it's