Enable EROFS filesystem support as module

Enable EROFS_FS as module, enable EROFS_FS_XATTR, EROFS_FS_POSIX_ACL,
EROFS_FS_SECURITY, EROFS_FS_ZIP and EROFS_FS_CLUSTER_PAGE_LIMIT.

Closes: #946569
Thanks: Gao Xiang <gaoxiang25@huawei.com>