Configure death handler: remember to call original death handler

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6776)

Configure

diff --git a/Configure b/Configure
index e9e7866..8e99f60 100755
--- a/Configure
+++ b/Configure
@@ -2731,6 +2731,7 @@
 your available compiler tool chain or change your configuration.
 
 _____
+    $orig_death_handler->(@_) if defined $orig_death_handler;
 }
 
 # Configuration file reading #########################################