[Toybox] build toybox with full SMACK capabilities.

[Joya Cruz, Alejandro]

I'm trying to build toybox with all the support to Smack that already
exist. the only configuration difference from make defconfig are
CONFIG_TOYBOX_SMACK=y
#CONFIG_TOYBOX_LSM_NONE is not set  
Do I have any other missing configuration?
with my current configuration I have the next use case not working
| root at qemux86:/tmp# touch foo
| root at qemux86:/tmp# chsmack -a test foo
| root at qemux86:/tmp# chsmack foo
| foo access="test"
| root at qemux86:/tmp# ls -Z
| ? foo
I would be expecting to get something like
|root at qemux86:/tmp# ls -Z
|test foo