Revert "UBUNTU: SAUCE: Revert: fix: only allow a single threaded process to ..."

BugLink: http://bugs.launchpad.net/bugs/1379535

This reverts commit 9b306795.
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

security/apparmor/domain.c

@@ -818,6 +818,13 @@ int aa_change_profile(const char *ns_name, const char *hname, bool onexec,
 	if (error)
 		goto audit;
 
+	if (onexec && !current_is_single_threaded()) {
+		info = "not a single threaded task";
+		error = -EACCES;
+		goto audit;
+	}
+
+
 	if (permtest)
 		goto audit;