mark all block comments that need format preserving so that

indent will not alter them when reformatting comments

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

ssl/heartbeat_test.c

@@ -1,5 +1,5 @@
 /* test/heartbeat_test.c */
-/*
+/*-
  * Unit test for TLS heartbeats.
  *
  * Acts as a regression test against the Heartbleed bug (CVE-2014-0160).