Replace "All Files (*.*)" with "All Files (*)"

To quote the Qt documentation for QFileDialog::setNameFilters:

> Note that the filter *.* is not portable, because the historical
> assumption that the file extension determines the file type is not
> consistent on every operating system. It is possible to have a file
> with no dot in its name (for example, Makefile). In a native Windows
> file dialog, *.* will match such files, while in other types of file
> dialogs it may not. So it is better to use * if you mean to select
> any file.

Admittedly, one of these usages is Windows-only and we are using the
native file dialog there, but we might as well be consistent.

qrenderdoc/Code/QRDUtils.cpp

@@ -514,7 +514,7 @@ QString RDDialog::getExecutableFileName(QWidget *parent, const QString &caption,
 
 #if defined(Q_OS_WIN32)
   // can't filter by executable bit on windows, but we have extensions
-  filter = QApplication::translate("RDDialog", "Executables (*.exe);;All Files (*.*)");
+  filter = QApplication::translate("RDDialog", "Executables (*.exe);;All Files (*)");
 #endif
 
   QFileDialog fd(parent, caption, dir, filter);