Smack: Add smkfstransmute mount option

Suppliment the smkfsroot mount option with another, smkfstransmute,
that does the same thing but also marks the root inode as
transmutting. This allows a freshly created filesystem to
be mounted with a transmutting heirarchy.

Targeted for git://git.gitorious.org/smack-next/kernel.git

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 159f25b..339614c 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -143,6 +143,7 @@
 #define SMK_FSFLOOR	"smackfsfloor="
 #define SMK_FSHAT	"smackfshat="
 #define SMK_FSROOT	"smackfsroot="
+#define SMK_FSTRANS	"smackfstransmute="
 
 #define SMACK_CIPSO_OPTION 	"-CIPSO"