fixed wrong type for "allow_compaction" parameter
fixed wrong type for "allow_compaction" parameter

Summary:
should be boolean, not uint64_t
MSVC complains about it during compilation with error `include\rocksdb\advanced_options.h(77): warning C4800: 'uint64_t': forcing value to bool 'true' or 'false' (performance warning)`
Closes https://github.com/facebook/rocksdb/pull/2487

Differential Revision: D5310685

Pulled By: siying

fbshipit-source-id: 719a33b3dba4f711aa72e3f229013c188015dc86

vmx/rocksdb,vmx/rocksdb,vmx/rocksdb,vmx/rocksdb,vmx/rocksdb,vmx/rocksdb,vmx/rocksdb,vmx/rocksdb