Updated indexes to have intl and opcache extensions for precise and trusty environments.
Updated PHP 5.4.31 & 5.5.15 binaries.  New binaries have more functionality split out into shared libraries.  Because of this, you may now need to activate shared libraries that were previously compiled into PHP.  The upside of this is that the PHP binary was reduced in size by about 3M, which means downloads during stating should go faster.
Fix to set the MIBDIRS environment variable, if snmp module is installed.
Update build pack utils to #34775ea.
Merging upstream