combining php files into one file unnecessary, so changing build.sh accordingly
combining php files into one file unnecessary, so changing build.sh accordingly

10gen-labs/mongo-hhvm-driver,txg168/mongo-hhvm-driver,110035/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver,txg168/mongo-hhvm-driver,txg168/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-unsupported,110035/mongo-hhvm-driver,apuckey/mongo-hhvm-driver,apuckey/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-unsupported,110035/mongo-hhvm-driver,apuckey/mongo-hhvm-driver,110035/mongo-hhvm-driver,apuckey/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-unsupported