Bug#816184: php-horde-memcache depends on package that is no longer built.

[peter green]

Package: php-horde-memcache
Version: 2.0.7-3
Severity: serious
php-horde-memcache depends on php5-memcache which is no longer built by 
the php-memcache source package.

Ubuntu seems to indicate that a no-change rebuild is enough to fix this.