Log Message:
Update ruby-activerecord32 to 3.2.8.

## Rails 3.2.8 (Aug 9, 2012) ##

* Do not consider the numeric attribute as changed if the old value is zero
  and the new value is not a string.
  Fixes #7237.

  *Rafael Mendonça França*

* Removes the deprecation of `update_attribute`. *fxn*

* Reverted the deprecation of `composed_of`. *Rafael Mendonça França*

* Reverted the deprecation of `*_sql` association options. They will be
  deprecated in 4.0 instead. *Jon Leighton*

* Do not eager load AR session store. ActiveRecord::SessionStore depends on
  the abstract store in Action Pack. Eager loading this class would break
  client code that eager loads Active Record standalone.
  Fixes #7160

  *Xavier Noria*

* Do not set RAILS_ENV to "development" when using `db:test:prepare` and
  related rake tasks.
  This was causing the truncation of the development database data when using
  RSpec.

  Fixes #7175.

  *Rafael Mendonça França*