Windows: Init root.afs before smb_Init

Windows: Init root.afs before smb_Init

It is not safe to initialize the root.afs cm_scache object
after the SMB package.  Break it out of afsd_InitDaemon()
into its own afsd_InitRoot() and call from afsd_InitCM().

LICENSE MIT

Reviewed-on: http://gerrit.openafs.org/331
Tested-by: Asanka Herath <asanka@secure-endpoints.com>
Reviewed-by: Asanka Herath <asanka@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>