Get rid of security_context_t and fix const declarations.

The const security_context_t declarations were incorrect;
const char * was intended, not char * const.   Easiest fix is to
replace them all with const char *.  And while we are at it, just
get rid of all usage of security_context_t itself as it adds no value.
typedef left to permit building legacy users until such a time as all are
updated.

Change-Id: I2f9df7bb9f575f76024c3e5f5b660345da2931a7
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
diff --git a/src/enabled.c b/src/enabled.c
index 569a7a0..ab015a4 100644
--- a/src/enabled.c
+++ b/src/enabled.c
@@ -14,7 +14,7 @@
 	FILE *fp;
 	char *bufp;
 	int enabled = 0;
-	security_context_t con;
+	char * con;
 
 	/* init_selinuxmnt() gets called before this function. We
  	 * will assume that if a selinux file system is mounted, then