SQL export uses wrong line terminators for Windows

According to Qt documentation:

When writing, the end-of-line terminators are translated to the local
encoding, for example '\r\n' for Win32.

Reported in issue #1502

src/sqlitedb.cpp

@@ -655,7 +655,7 @@ bool DBBrowserDB::dump(const QString& filePath,
 
     // Open file
     QFile file(filePath);
-    if(file.open(QIODevice::WriteOnly))
+    if(file.open(QIODevice::WriteOnly|QIODevice::Text))
     {
         QApplication::setOverrideCursor(Qt::WaitCursor);