add gawk

packages/gawk.rb

@@ -0,0 +1,16 @@
+require 'package'
+
+class Gawk < Package
+  version '4.1.1'
+  source_url 'http://ftp.gnu.org/gnu/gawk/gawk-4.1.1.tar.gz'
+  source_sha1 '0480d23fffbf04bfd0d4ede4c1c3d57eb81cc771'
+
+  def self.build
+    system './configure --prefix=/usr/local'
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end