-DQT_GENERATE_WRAPPER_SCRIPTS_FOR_ALL_HOSTS=ON on windows generates windows line endings for unix script

When using -DQT_GENERATE_WRAPPER_SCRIPTS_FOR_ALL_HOSTS=ON in windows build it generates also unix style wrapper scripts but those scripts have 2 issues that prevent us to use windows build packages in unix environment:

1. unix style wrapper script (e.g qmake) has windows line endings and that prevents qt online installer top use the script
2. Unix style wrapper script permissions are wrong and prevents installer to call it: -rw-rw-r--

• from unix build the permission is -rwxr-xr-x which is correct