macdeployqt: Don't remove rpaths more than once

In a universal build the tool will find multiple duplicated rpaths,
but the install_name tool doesn't like it if we try to remove it
more than once.

Fixes: QTBUG-109738
Pick-to: 6.5 6.4 6.2
Change-Id: I4a8bea0ad3e47b28e6384ceead551edc83e30d26
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

src/tools/macdeployqt/shared/shared.cpp

@@ -874,7 +874,8 @@ void deployRPaths(const QString &bundlePath, const QList<QString> &rpaths, const
             continue;
         }
         if (rpaths.contains(resolveDyldPrefix(rpath, binaryPath, binaryPath))) {
-            args << "-delete_rpath" << rpath;
+            if (!args.contains(rpath))
+                args << "-delete_rpath" << rpath;
         }
     }
     if (!args.length()) {