Add libdsm package (#3464)

Add pre-built binaries

packages/libdsm.rb

+require 'package'
+
+class Libdsm < Package
+  description 'Defective SMb: A minimalist implementation of a client library for SMB using Plain\'Ol C'
+  homepage 'https://videolabs.github.io/libdsm/'
+  version '0.3.0'
+  source_url 'https://github.com/videolabs/libdsm/releases/download/v0.3.0/libdsm-0.3.0.tar.gz'
+  source_sha256 '96caef854a1f7aa61ab6fdfca9c36a1813b37d23d013db0bc4ec7cd38a570b1c'
+
+  binary_url ({
+    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/libdsm-0.3.0-chromeos-armv7l.tar.xz',
+     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/libdsm-0.3.0-chromeos-armv7l.tar.xz',
+       i686: 'https://dl.bintray.com/chromebrew/chromebrew/libdsm-0.3.0-chromeos-i686.tar.xz',
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/libdsm-0.3.0-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+    aarch64: '03273279d98be86b0da0db0eb251c6a8475dcf32816337bef2aaaecf3f02318d',
+     armv7l: '03273279d98be86b0da0db0eb251c6a8475dcf32816337bef2aaaecf3f02318d',
+       i686: 'dd47b71fbc2ec25b1d307a426e14d36af75650aa278754b185c7236db83b7068',
+     x86_64: '7c42e38967b7b4de66544c4d95d17a0c71b7300e7afdbd70584a7c2f15c62122',
+  })
+
+  depends_on 'libtasn1'
+
+  def self.build
+    system './configure',
+           "--prefix=#{CREW_PREFIX}",
+           "--libdir=#{CREW_LIB_PREFIX}"
+    system 'make'
+  end
+
+  def self.install
+    system 'make', "DESTDIR=#{CREW_DEST_DIR}", 'install'
+  end
+end