Add mcelog package (#3262)

packages/mcelog.rb

+require 'package'
+
+class Mcelog < Package
+  description 'logs and accounts machine checks (in particular memory, IO, and CPU hardware errors) on modern x86 Linux systems.'
+  homepage 'https://www.mcelog.org/'
+  version '162'
+  source_url 'https://git.kernel.org/pub/scm/utils/cpu/mce/mcelog.git/snapshot/mcelog-162.tar.gz'
+  source_sha256 '875e98572e86240ea319ab1f69ee6d744eb8b73ac5d700e474f6410d0f52d3fc'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  def self.patch
+    system "sed -i 's,prefix := /usr,prefix := #{CREW_PREFIX},' Makefile"
+    system "sed -i 's,etcprefix :=,etcprefix := #{CREW_PREFIX},' Makefile"
+  end
+
+  def self.build
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end