[thirdparty] build RocksDB without liburing

As of 7.7.3 version, RocksDB picks up liburing by default if it's
present on the build machine, and it doesn't error out if the library
isn't found.  Since we don't yet have the liburing in Kudu's thirdparty,
that might result in unpredictable run-time dependencies.

For now, let's explicitly disable building RocksDB with liburing to
have more predictable build outcomes with RocksDB.  Probably, at some
point it makes sense add liburing to Kudu's thirdparty and re-enable
building RocksDB with liburing if performance tests show much better
results when using the library.

Change-Id: Ia5ac4fb18c90a18f0ae6f96f36888d46d0a4d264
Reviewed-on: http://gerrit.cloudera.org:8080/19317
Tested-by: Kudu Jenkins
Reviewed-by: Yingchun Lai <acelyc1112009@gmail.com>
1 file changed