Add data validation on seinfo labels.

Ensure that policy contains a clean seinfo
string. Where clean means no whitespace characters.

Change-Id: I814411cbc8d16eaed99a1389f5487529e36e617b
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
Replace SEAndroid with SELinux.

Change-Id: Ibbe544a9f025d71ad416bc01cee2145b62d7b2d4
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Drop "SE Android" from strings.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Change-Id: I814411cbc8d16eaed99a1389f5487529e36e627b