Fix typo in build_tools/fbcode_config.sh
Fix typo in build_tools/fbcode_config.sh

Summary: Fix typo in build_tools/fbcode_config.sh

Test Plan: none

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57363

ryneli/rocksdb,OverlordQ/rocksdb,Andymic/rocksdb,vmx/rocksdb,Andymic/rocksdb,ryneli/rocksdb,vmx/rocksdb,wenduo/rocksdb,wenduo/rocksdb,SunguckLee/RocksDB,vmx/rocksdb,facebook/rocksdb,wat-ze-hex/rocksdb,vmx/rocksdb,facebook/rocksdb,wat-ze-hex/rocksdb,hobinyoon/rocksdb,wat-ze-hex/rocksdb,vmx/rocksdb,tsheasha/rocksdb,ryneli/rocksdb,hobinyoon/rocksdb,wenduo/rocksdb,wenduo/rocksdb,norton/rocksdb,vmx/rocksdb,wat-ze-hex/rocksdb,SunguckLee/RocksDB,facebook/rocksdb,wat-ze-hex/rocksdb,Andymic/rocksdb,tsheasha/rocksdb,norton/rocksdb,OverlordQ/rocksdb,tsheasha/rocksdb,tsheasha/rocksdb,ryneli/rocksdb,hobinyoon/rocksdb,tsheasha/rocksdb,SunguckLee/RocksDB,OverlordQ/rocksdb,bbiao/rocksdb,bbiao/rocksdb,norton/rocksdb,facebook/rocksdb,hobinyoon/rocksdb,hobinyoon/rocksdb,tsheasha/rocksdb,wenduo/rocksdb,OverlordQ/rocksdb,facebook/rocksdb,Andymic/rocksdb,norton/rocksdb,ryneli/rocksdb,jalexanderqed/rocksdb,bbiao/rocksdb,wat-ze-hex/rocksdb,jalexanderqed/rocksdb,bbiao/rocksdb,norton/rocksdb,SunguckLee/RocksDB,Andymic/rocksdb,facebook/rocksdb,bbiao/rocksdb,SunguckLee/RocksDB,OverlordQ/rocksdb,norton/rocksdb,wenduo/rocksdb,SunguckLee/RocksDB,vmx/rocksdb,tsheasha/rocksdb,ryneli/rocksdb,norton/rocksdb,wenduo/rocksdb,jalexanderqed/rocksdb,hobinyoon/rocksdb,OverlordQ/rocksdb,ryneli/rocksdb,OverlordQ/rocksdb,tsheasha/rocksdb,facebook/rocksdb,Andymic/rocksdb,vmx/rocksdb,jalexanderqed/rocksdb,wenduo/rocksdb,SunguckLee/RocksDB,SunguckLee/RocksDB,bbiao/rocksdb,jalexanderqed/rocksdb,Andymic/rocksdb,bbiao/rocksdb,wat-ze-hex/rocksdb,Andymic/rocksdb,norton/rocksdb,bbiao/rocksdb,hobinyoon/rocksdb,wat-ze-hex/rocksdb,facebook/rocksdb,jalexanderqed/rocksdb,hobinyoon/rocksdb,jalexanderqed/rocksdb