Clang: Change Diagnostic timer

Change-Id: Ie43d922596423e0f7507f06bfec5be4e9f5f484a
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/tools/clangbackend/ipcsource/clangipcserver.cpp

@@ -67,7 +67,7 @@ ClangIpcServer::ClangIpcServer()
                                                           client()->diagnosticsChanged(message);
                                                       });
 
-    sendDiagnosticsTimer.setInterval(1000);
+    sendDiagnosticsTimer.setInterval(300);
     QObject::connect(&sendDiagnosticsTimer,
                      &QTimer::timeout,
                      [this] () { translationUnits.sendChangedDiagnostics(); });