Fix mk1mf build

Removing certs broke the mk1mf build.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

util/mk1mf.pl

@@ -806,7 +806,7 @@ reallyclean:
 
 EOF
 
-$rules .= &do_rehash_rule("rehash.time", "certs/demo apps tools");
+$rules .= &do_rehash_rule("rehash.time", "apps tools");
 $rules .= &do_test_rule("test", "rehash.time", "run_tests.pl");
 
 $rules .= <<"EOF";

util/pl/BC-32.pl

@@ -99,9 +99,6 @@ sub do_rehash_rule {
     my ($target, $deps) = @_;
     my $ret = <<"EOF";
 $target: $deps
-	set OPENSSL=\$(BIN_D)${o}openssl.exe
-	set OPENSSL_DEBUG_MEMORY=on
-	\$(PERL) \$(BIN_D)${o}c_rehash certs/demo
 	echo off > $target
 EOF
     return $ret

util/pl/VC-32.pl

@@ -305,9 +305,6 @@ sub do_rehash_rule {
     my ($target, $deps) = @_;
     my $ret = <<"EOF";
 $target: $deps
-	set OPENSSL=\$(BIN_D)${o}openssl.exe
-	set OPENSSL_DEBUG_MEMORY=on
-	\$(PERL) \$(BIN_D)${o}c_rehash certs/demo
 	echo off > $target
 EOF
     return $ret

util/pl/unix.pl

@@ -190,11 +190,7 @@ sub do_rehash_rule {
     my ($target, $deps) = @_;
     my $ret = <<"EOF";
 $target: $deps
-	(OPENSSL="`pwd`/util/opensslwrap.sh"; \\
-	OPENSSL_DEBUG_MEMORY=on; \\
-	export OPENSSL OPENSSL_DEBUG_MEMORY; \\
-	\$(PERL) \$(BIN_D)${o}c_rehash certs/demo; \\
-	touch $target)
+	touch $target
 EOF
     return $ret
 }