Clang: Store the database in user resources

We used temporary directories but this can be different paths.

Task-number: QTCREATORBUG-19372
Change-Id: Id6ac18e6eecdc5bb354bda3741e16cb87c552ba6
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/clangsupport/connectionclient.cpp

@@ -41,7 +41,6 @@ namespace ClangBackEnd {
 ConnectionClient::ConnectionClient(const QString &connectionName)
     : m_connectionName(connectionName)
 {
-    m_processCreator.setArguments({connectionName});
     m_processCreator.setObserver(this);
 
     listenForConnections();