Add Grep (#4820)

* create grep
* add bintray links
* deps are core

packages/grep.rb

+
+require 'package'
+
+class Grep < Package
+  description 'A string search utility'
+  homepage 'https://www.gnu.org/software/grep/'
+  version '3.6'
+  compatibility 'all'
+  source_url 'https://ftp.gnu.org/gnu/grep/grep-3.6.tar.xz'
+  source_sha256 '667e15e8afe189e93f9f21a7cd3a7b3f776202f417330b248c2ad4f997d9373e'
+
+  binary_url ({
+     aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/grep-3.6-chromeos-armv7l.tar.xz',
+      armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/grep-3.6-chromeos-armv7l.tar.xz',
+        i686: 'https://dl.bintray.com/chromebrew/chromebrew/grep-3.6-chromeos-i686.tar.xz',
+      x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/grep-3.6-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+     aarch64: '87ebec000c54b032f1e2720b03a30dfb13f14dc3a2a68a4c943daae64dc5ee34',
+      armv7l: '87ebec000c54b032f1e2720b03a30dfb13f14dc3a2a68a4c943daae64dc5ee34',
+        i686: 'a6a62d2c91c346041fc4408727e387e2cc415e304d2ca7d372a97256520d6f64',
+      x86_64: '0106cbf95ada69fc0205b4af06af4e46144156934555b5bd9376e4c00d61092f',
+  })
+
+
+  def self.build
+    ENV['CFLAGS'] = '-flto'
+    system "./configure #{CREW_OPTIONS}\
+    --without-included-regex"
+    system "make"
+  end
+  def self.install
+    system "make DESTDIR=#{CREW_DEST_DIR} install"
+  end
+end