Implement the booleans test in sepolicy-analyze so
that we can move the no-booleans check from the
SELinuxTest to the SELinuxHostTest along with the
other policy checks.

Change-Id: I95d7ad34da10c354470f43734d34a6ec631a7b4e
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>