Added openssh and strace

packages/openssh.rb

+require 'package'
+
+class Openssh < Package
+  version '7.5'
+  source_url 'https://github.com/openssh/openssh-portable/archive/V_7_5_P1.tar.gz'
+  source_sha1 '3c5d829be2d30ed80feef708231ec223cd37b264'
+
+  depends_on 'buildessential'
+  depends_on 'autoconf'
+
+  def self.build
+    system "autoconf"
+    system "autoheader"
+    system "./configure --prefix=/usr/local"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end

packages/strace.rb

+require 'package'
+
+class Strace < Package
+  version '4.16'
+  source_url 'https://downloads.sourceforge.net/project/strace/strace/4.16/strace-4.16.tar.xz'
+  source_sha1 'b780a8cd2e60ea836cfd3468e0f81623a346d180'
+
+  depends_on 'buildessential'
+
+  def self.build
+    system "./configure --prefix=/usr/local"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end