Backup upstream version of POL_Install_ubigamelauncher function
POL_Install_ubigamelauncher: do not put setup into ressources

Unless its download is validated with a hash; Otherwise in case of
download problem, the only solution for the user is to go clean his
resources cache.
Backup upstream version of POL_Install_xmllite function
POL_Install_xmllite: remove spurious spaces
POL_Install_xmllite: use POL_Download_Resource
Backup upstream version of POL_Remove_gfwl function
POL_Install_gfwl: fix typo
POL_Remove_gfwl: do not put setup into ressources

Unless its download is validated with a hash; Otherwise in case of
download problem, the only solution for the user is to go clean his
resources cache.