Add more packages missing description and homepage metadata

packages/bashdb.rb

 require 'package'
 
 class Bashdb < Package
+  description 'The Bash Debugger Project is a source-code debugger for bash that follows the gdb command syntax.'
+  homepage 'http://bashdb.sourceforge.net/'
   version '4.4-0.92'
   source_url 'https://downloads.sourceforge.net/project/bashdb/bashdb/4.2-0.92/bashdb-4.4-0.92.tar.gz'
   source_sha1 '918c7d576c476c4b7d768e1fccda6150cf5ca62d'

packages/cdrkit.rb

 require 'package'
 
 class Cdrkit < Package
+  description 'cdrkit is a suite of programs for recording CDs and DVDs, blanking CD-RW media, creating ISO-9660 filesystem images, extracting audio CD data, and more.'
+  homepage 'https://launchpad.net/cdrkit'
   version '1.1.11'
   source_url 'https://downloads.sourceforge.net/project/wodim/cdrkit/cdrkit_1.1.11.orig.tar.gz'
   source_sha1 '3f7ddc06db0272942e1a4cd98c3c96462df77387'

packages/glibc219.rb

 require 'package'
 
 class Glibc219 < Package
+  description 'GNU C Library'
+  homepage 'https://www.gnu.org/software/libc/'
   version '2.19'
   binary_url ({
     aarch64: 'https://github.com/jam7/chromebrew/releases/download/newtoolchains/glibc-2.19-chromeos-armv7l.tar.xz',

packages/libcap.rb

 require 'package'
 
 class Libcap < Package
+  description 'Libcap implements the user-space interfaces to the POSIX 1003.1e capabilities available in Linux kernels.'
+  homepage 'https://directory.fsf.org/wiki/Libcap'
   version '2.25'
   source_url 'https://www.kernel.org/pub/linux/libs/security/linux-privs/libcap2/libcap-2.25.tar.xz'
   source_sha1 'f0b102e4a68e1bbdcb6b143b63c34a250e473088'

packages/libtasn1.rb

 require 'package'
 
 class Libtasn1 < Package
+  description 'Libtasn1 is the ASN.1 library used by GnuTLS, GNU Shishi and some other packages.'
+  homepage 'https://www.gnu.org/software/libtasn1/'
   version '4.10-1'
   source_url 'http://ftpmirror.gnu.org/libtasn1/libtasn1-4.10.tar.gz'
   source_sha1 'c7b36fa50866bbc889f7503c7fd1e9f9d7c52a64'

packages/libunbound.rb

 require 'package'
 
 class Libunbound < Package
+  description 'Unbound is a validating, recursive, and caching DNS resolver.'
+  homepage 'https://www.unbound.net/'
   version '1.6.2'
   source_url 'https://www.unbound.net/downloads/unbound-1.6.2.tar.gz'
   source_sha1 'de370b1ac8e260db9c4c1504453752713dd8818f'