checkpolicy,libselinux,libsepol,policycoreutils: Update my email address

Update my email address since epoch.ncsc.mil no longer exists.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
diff --git a/checkpolicy/checkpolicy.c b/checkpolicy/checkpolicy.c
index b75f2af..923b47c 100644
--- a/checkpolicy/checkpolicy.c
+++ b/checkpolicy/checkpolicy.c
@@ -1,6 +1,6 @@
 
 /*
- * Author : Stephen Smalley, <sds@epoch.ncsc.mil> 
+ * Author : Stephen Smalley, <sds@tycho.nsa.gov>
  */
 
 /*