openssl: update to version 1.1.1a

This version adds the following functionality:
  * TLS 1.3
  * AFALG engine support for hardware accelleration
  * x25519 ECC curve support
  * CRIME protection: disable use of compression by default
  * Support for ChaCha20 and Poly1305

Patches fixing bugs in the /dev/crypto engine were applied, from
https://github.com/openssl/openssl/pull/7585

This increses the size of the ipk binray on MIPS32 by about 32%:
old:
693.941 bin/packages/mips_24kc/base/libopenssl1.0.0_1.0.2q-2_mips_24kc.ipk
193.827 bin/packages/mips_24kc/base/openssl-util_1.0.2q-2_mips_24kc.ipk

new:
912.493 bin/packages/mips_24kc/base/libopenssl1.1_1.1.1a-2_mips_24kc.ipk
239.316 bin/packages/mips_24kc/base/openssl-util_1.1.1a-2_mips_24kc.ipk

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

package/libs/openssl/patches/100-Configure-afalg-support.patch

@@ -0,0 +1,23 @@
+From bf4f3a5696c65b4a48935599ccba43311c114c95 Mon Sep 17 00:00:00 2001
+From: Eneas U de Queiroz <cote2004-github@yahoo.com>
+Date: Thu, 27 Sep 2018 08:29:21 -0300
+Subject: Do not use host kernel version to disable AFALG
+
+This patch prevents the Configure script from using the host kernel
+version to disable building the AFALG engine on openwrt targets.
+
+Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>
+
+--- a/Configure
++++ b/Configure
+@@ -1554,7 +1554,9 @@ unless ($disabled{"crypto-mdebug-backtra
+ 
+ unless ($disabled{afalgeng}) {
+     $config{afalgeng}="";
+-    if (grep { $_ eq 'afalgeng' } @{$target{enable}}) {
++    if ($target =~ m/openwrt$/) {
++        push @{$config{engdirs}}, "afalg";
++    } elsif (grep { $_ eq 'afalgeng' } @{$target{enable}}) {
+         my $minver = 4*10000 + 1*100 + 0;
+         if ($config{CROSS_COMPILE} eq "") {
+             my $verstr = `uname -r`;