Debugger: Fix string usages.

- Compile with QT_NO_CAST_FROM_ASCII.
- Remove single character string constants.

Change-Id: Icece98619b6c30e047d3fce00e6ae74bbcd53c67
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/loadcoredialog.cpp

@@ -28,6 +28,8 @@
 **
 **************************************************************************/
 
+#define QT_NO_CAST_FROM_ASCII
+
 #include "loadcoredialog.h"
 
 #include "debuggerconstants.h"
@@ -203,7 +205,7 @@ void SelectRemoteFileDialog::selectFile()
             SLOT(handleSftpOperationFinished(QSsh::SftpJobId,QString)));
 
     {
-        QTemporaryFile localFile(QDir::tempPath() + "/remotecore-XXXXXX");
+        QTemporaryFile localFile(QDir::tempPath() + QLatin1String("/remotecore-XXXXXX"));
         localFile.open();
         m_localFile = localFile.fileName();
     }