Enable/disable crypto-mdebug just like other features

Also always abort() on leak failure.

Reviewed-by: Stephen Henson <steve@openssl.org>

test/evp_extra_test.c

diff --git a/test/evp_extra_test.c b/test/evp_extra_test.c
index 0d6ad03..13dd262 100644
--- a/test/evp_extra_test.c
+++ b/test/evp_extra_test.c
@@ -466,7 +466,7 @@
     CRYPTO_cleanup_all_ex_data();
     ERR_remove_thread_state(NULL);
     ERR_free_strings();
-#ifdef CRYPTO_MDEBUG
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
     CRYPTO_mem_leaks_fp(stderr);
 #endif