Revert "Debugger: Pass data-directory to gdb on Windows"

Patching GDB instead

This reverts commit fe4b6feeb3e7aabef0be8d5d59e0c93ca567d8fa

Change-Id: I02f17eece95f9b36ed6ae56c09dbf3bc6d161c78
Reviewed-by: David Schulz <david.schulz@digia.com>