dev-php/pecl-memcached: revbump to fix incorrect DOCS.

dev-php/pecl-memcached: revbump to fix incorrect DOCS.

The main reason for a revision bump is to update the DOCS string
(which pointed to a missing file). This is a prerequisite for fixing
the buggy eclass that allows junk in DOCS.

In the process, some other cleanup was done:

  * Change from EAPI=4 to EAPI=5.
  * Add ChangeLog and README.markdown as DOCS.
  * Reorder the USE_PHP flags.
  * Drop the base.eclass inherit (this was used to apply patches).
  * Drop the custom src_prepare (used to call base.eclass to apply patches).
  * Add an "any slot" dependency on dev-lang/php.
  * Shorten the description a little to fit in 80 chars.

Package-Manager: portage-2.2.20.1