PCBC-217: Add package.xml to build with PECL
PCBC-217: Add package.xml to build with PECL

Change-Id: Iad0155c29285851c1e1badfa6e3e6d3f8f33f2f1
Reviewed-on: http://review.couchbase.org/25445
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

couchbase/php-ext-couchbase,couchbase/php-ext-couchbase,couchbase/php-ext-couchbase,couchbase/php-ext-couchbase,couchbase/php-ext-couchbase