Update libssh2 to 1.9.0 (#3559)

Needs binaries and will need rebuilt again with OpenSSL

This (IMO stupid) process ensures that the new OpenSSL
versions won't break the core

packages/libssh2.rb

@@ -3,21 +3,13 @@ require 'package'
 class Libssh2 < Package
   description 'libssh2 is a client-side C library implementing the SSH2 protocol.'
   homepage 'https://www.libssh2.org/'
-  version '1.8.1'
-  source_url 'https://www.libssh2.org/download/libssh2-1.8.1.tar.gz'
-  source_sha256 '40b517f35b1bb869d0075b15125c7a015557f53a5a3a6a8bffb89b69fd70f159'
+  version '1.9.0'
+  source_url 'https://www.libssh2.org/download/libssh2-1.9.0.tar.gz'
+  source_sha256 'd5fb8bd563305fd1074dda90bd053fb2d29fc4bce048d182f96eaa466dfadafd'
 
   binary_url ({
-    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/libssh2-1.8.1-chromeos-armv7l.tar.xz',
-     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/libssh2-1.8.1-chromeos-armv7l.tar.xz',
-       i686: 'https://dl.bintray.com/chromebrew/chromebrew/libssh2-1.8.1-chromeos-i686.tar.xz',
-     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/libssh2-1.8.1-chromeos-x86_64.tar.xz',
   })
   binary_sha256 ({
-    aarch64: 'd8fae766d77818ef95ae8a993bda0c03730d773cfb8392ceaaf6c8697206409c',
-     armv7l: 'd8fae766d77818ef95ae8a993bda0c03730d773cfb8392ceaaf6c8697206409c',
-       i686: 'ccdea94d6dcc0bdd27b364cd99f53e9aba6f90f0b8272a5f3856bf2a9a32beb6',
-     x86_64: '1025b413f30c5ac27bfa340e41cb437bf19311e72b95030f64020e25be4cda31',
   })
 
   def self.patch