Update sysutils/ruby-activesambaldap to 0.0.8.

* Use lang/ruby/gem.mk instead of misc/rubygems/rubygem.mk.
* Add LICENSE.
* Remove default value of GEM_BUILD.

== 0.0.8: 2009-09-22

* [#26692] scaffold_active_samba_ldap doesn't work with Rails 2.2.2.
  [Orlando Marquina]
* [#26814] scaffold_active_samba_ldap generates wrong class name.
  [Orlando Marquina]
* Supported ActiveLdap 1.2.0.

== 0.0.7: 2009-07-18

* Supported ActiveLdap 1.1.0.
* Supported gem plugin.

(taca)