Have Configure's HASH or TABLE produce complete lists

Because some targets execute perl code that might die, we risk
incomplete lists.  Make it so dying doesn't happen when we're listing
targets.

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

Configure

diff --git a/Configure b/Configure
index 4fec746..4fbce03 100755
--- a/Configure
+++ b/Configure
@@ -788,7 +788,9 @@
     @tocheckfor = (keys %new_tocheckfor);
 }
 
+our $die = sub { die @_; };
 if ($target eq "TABLE") {
+    local $die = sub { warn @_; };
     foreach (sort keys %table) {
 	print_table_entry($_, "TABLE");
     }
@@ -803,6 +805,7 @@
 }
 
 if ($target eq "HASH") {
+    local $die = sub { warn @_; };
     print "%table = (\n";
     foreach (sort keys %table) {
 	print_table_entry($_, "HASH");