[New Package] iw (#4957)

* [New Package] iw

* Change /usr/local to CREW_PREFIX

* Fix sed command

Change `sed -i 's:usr:#{CREW_PREFIX}:g' Makefile` to `sed -i 's:/usr:#{CREW_PREFIX}:g' Makefile`

packages/iw.rb

+require 'package'
+
+class Iw < Package
+  description 'iw is a new nl80211 based CLI configuration utility for wireless devices.'
+  homepage 'https://wireless.wiki.kernel.org/en/users/documentation/iw'
+  version '5.9'
+  compatibility 'all'
+  source_url 'https://git.kernel.org/pub/scm/linux/kernel/git/jberg/iw.git/snapshot/iw-5.9.tar.gz'
+  source_sha256 'f38a82a9bfa2a45d6bf471fe84df9c39bed3d3ca0e8931ed31951f603e21deb3'
+
+  depends_on 'libnl3'
+  
+  def self.patch
+    system "sed -i 's:/usr:#{CREW_PREFIX}:g' Makefile" # Change prefix to CREW_PREFIX
+  end
+
+  def self.build
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+
+  def self.check
+    system "make", "check"
+  end
+end