dev-lang/php: new revisions with updated oracle dependencies.

For a while, the dev-db/oracle-instantclient-basic package has been an
"alias" for dev-db/oracle-instantclient[sdk], to ease migration to the
latter. This commit adds revisions for the three supported PHP slots
to finally update the dependency. I can't really test the Oracle
client, but this should be at least as good as it was, given that
oracle-instantclient-basic was just pulling in oracle-instantclient
anyway.

I've also added a REQUIRED_USE blocker for LDAP when building PHP with
Oracle support. There are several reports that the instant client
brings its own LDAP library, and that linking it against another one
causes crashes. Again, who knows. Better safe than sorry?

Closes: https://bugs.gentoo.org/765634
Package-Manager: Portage-3.0.13, Repoman-3.0.2
Signed-off-by: Michael Orlitzky <[email protected]>