Add gemacs package

Remove lcms dependency

Add pre-built binaries

packages/gemacs.rb

+require 'package'
+
+class Gemacs < Package
+  description 'An extensible, customizable, free/libre text editor - and more.'
+  homepage 'http://www.gnu.org/software/emacs/'
+  version '26.1'
+  source_url 'https://ftp.gnu.org/gnu/emacs/emacs-26.1.tar.xz'
+  source_sha256 '1cf4fc240cd77c25309d15e18593789c8dbfba5c2b44d8f77c886542300fd32c'
+
+  binary_url ({
+    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/gemacs-26.1-chromeos-armv7l.tar.xz',
+     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/gemacs-26.1-chromeos-armv7l.tar.xz',
+       i686: 'https://dl.bintray.com/chromebrew/chromebrew/gemacs-26.1-chromeos-i686.tar.xz',
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/gemacs-26.1-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+    aarch64: '4ded760607b64f706cc83b92042609845f8213a697bc82a931f04ddcf1c94a17',
+     armv7l: '4ded760607b64f706cc83b92042609845f8213a697bc82a931f04ddcf1c94a17',
+       i686: 'f8c514abd49a4a8aefa6235918d442d75d1a722e9558cd741246769cfeb9c8da',
+     x86_64: '7d646d49bec0acf2c7eb79ff589c6f311537233565f43646dafa927de1adbb8c',
+  })
+
+  depends_on 'emacs'
+  depends_on 'giflib'
+  depends_on 'libjpeg'
+  depends_on 'libtiff'
+  depends_on 'sommelier'
+
+  def self.build
+    system "./configure \
+            --prefix=#{CREW_PREFIX} \
+            --localstatedir=#{CREW_PREFIX}/share \
+            --with-x=yes \
+            --with-x-toolkit=lucid \
+            --with-gif=yes \
+            --without-makeinfo \
+            --without-selinux"
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+    system "rm -rf #{CREW_DEST_DIR}"
+    system "install -Dm755 src/emacs #{CREW_DEST_PREFIX}/bin/gemacs"
+    system "install -Dm755 src/emacs-26.1.1 #{CREW_DEST_PREFIX}/bin/gemacs-26.1.1"
+  end
+end