Add nping diagnostic tool from the nmap suite

packages/nping.rb

+require 'package'
+
+class Nping < Package
+  description 'Nping is part of the nmap suite - a network diagnostics tool`.'
+  homepage 'https://nmap.org/nping/'
+  version '7.60'
+  source_url 'https://nmap.org/dist/nmap-7.60.tar.bz2'
+  source_sha256 'a8796ecc4fa6c38aad6139d9515dc8113023a82e9d787e5a5fb5fa1b05516f21'
+
+  binary_url ({
+    x86_64: 'https://www.clift.org/fred/chromebrew/nping-7.60-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+    x86_64: '208ed7878333564c9ea15d82174d542ea1c6e5d93b2ef0219000c5b8de695eb2',
+  })
+
+  depends_on 'buildessential' => :build
+  depends_on 'openssl' 
+  depends_on 'filecmd' => :build   #configure uses file 
+
+  def self.build
+    #fixup "/usr/bin/file" -> "/usr/local/bin/file" in the configure scripts
+    system "sed -i s#/usr/bin/file#/usr/local/bin/file#g libdnet-stripped/configure"
+
+    # make files in the project dont have the right dependencies to build this by itself
+    # so just make the whole thing and then install nping later. not effecient, but
+    # more likely to work than making a bunch of Makefile dependency edits
+    system "./configure && make"
+  end
+
+  def self.install
+    system "cd nping && make DESTDIR=#{CREW_DEST_DIR} install"
+  end
+end