Add whitedb package

WhiteDB is a Lightweight NoSQL database library operaring fully in main memory.

Tested as working on Samsung Chromebook Plus (aarch64). All tests passing.

packages/whitedb.rb

+require 'package'
+
+class Whitedb < Package
+  description 'Lightweight NoSQL database library operaring fully in main memory'
+  homepage 'http://whitedb.org'
+  version '0.7.3'
+  source_url 'https://whitedb.org/whitedb-0.7.3.tar.gz'
+  source_sha256 '10c4ccd754ed2d53dbdef9ec16c88c732aa73d923fc0ee114e7e3a78a812849d'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  def self.build
+    system './configure',
+      "--prefix=#{CREW_PREFIX}",
+      "--libdir=#{CREW_LIB_PREFIX}",
+      '--disable-depedency-tracking'
+    system 'make'
+  end
+
+  def self.install
+    system 'make', "DESTDIR=#{CREW_DEST_DIR}", 'install'
+  end
+end