README: fix typo ("gfvs" -> "gvfs")
README: fix typo ("gfvs" -> "gvfs")

jemc/libmtp,libmtp/libmtp,reverendhomer/libmtp,jemc/libmtp,libmtp/libmtp,reverendhomer/libmtp,philipl/libmtp,philipl/libmtp,libmtp/libmtp,jemc/libmtp,reverendhomer/libmtp,philipl/libmtp,reverendhomer/libmtp,jemc/libmtp