[ldb compact is not allowing ttl flag]
[ldb compact is not allowing ttl flag]

Summary: Allow ttl flag

Test Plan:
tested on my database that has merge operations and ttl

Revert Plan: OK

Task ID: #3038186

Reviewers: emayanke, dhruba, haobo

Reviewed By: emayanke

CC: leveldb

Differential Revision: https://reviews.facebook.net/D13503

vmx/rocksdb,bbiao/rocksdb,bbiao/rocksdb,tizzybec/rocksdb,amyvmiwei/rocksdb,norton/rocksdb,ylong/rocksdb,dkorolev/rocksdb,temicai/rocksdb,ylong/rocksdb,OverlordQ/rocksdb,vmx/rocksdb,JoeWoo/rocksdb,skunkwerks/rocksdb,virtdb/rocksdb,caijieming-baidu/rocksdb,siddhartharay007/rocksdb,mbarbon/rocksdb,skunkwerks/rocksdb,wskplho/rocksdb,lgscofield/rocksdb,kaschaeffer/rocksdb,anagav/rocksdb,wenduo/rocksdb,Applied-Duality/rocksdb,rDSN-Projects/rocksdb.replicated,siddhartharay007/rocksdb,ylong/rocksdb,ryneli/rocksdb,lgscofield/rocksdb,JohnPJenkins/rocksdb,Vaisman/rocksdb,wenduo/rocksdb,geraldoandradee/rocksdb,tizzybec/rocksdb,SunguckLee/RocksDB,anagav/rocksdb,bbiao/rocksdb,OverlordQ/rocksdb,flabby/rocksdb,wat-ze-hex/rocksdb,tsheasha/rocksdb,NickCis/rocksdb,mbarbon/rocksdb,fengshao0907/rocksdb,amyvmiwei/rocksdb,dkorolev/rocksdb,alihalabyah/rocksdb,wskplho/rocksdb,SunguckLee/RocksDB,flabby/rocksdb,ryneli/rocksdb,temicai/rocksdb,ryneli/rocksdb,tschottdorf/rocksdb,JoeWoo/rocksdb,hobinyoon/rocksdb,wlqGit/rocksdb,dkorolev/rocksdb,biddyweb/rocksdb,ylong/rocksdb,tsheasha/rocksdb,geraldoandradee/rocksdb,makelivedotnet/rocksdb,tsheasha/rocksdb,jalexanderqed/rocksdb,RyanTech/rocksdb,flabby/rocksdb,hobinyoon/rocksdb,NickCis/rocksdb,JohnPJenkins/rocksdb,RyanTech/rocksdb,Vaisman/rocksdb,bbiao/rocksdb,SunguckLee/RocksDB,flabby/rocksdb,flabby/rocksdb,Applied-Duality/rocksdb,facebook/rocksdb,wenduo/rocksdb,hobinyoon/rocksdb,zhangpng/rocksdb,skunkwerks/rocksdb,caijieming-baidu/rocksdb,Andymic/rocksdb,tizzybec/rocksdb,wskplho/rocksdb,amyvmiwei/rocksdb,ylong/rocksdb,wskplho/rocksdb,msb-at-yahoo/rocksdb,hobinyoon/rocksdb,wenduo/rocksdb,tsheasha/rocksdb,alihalabyah/rocksdb,Andymic/rocksdb,alihalabyah/rocksdb,jalexanderqed/rocksdb,Applied-Duality/rocksdb,rDSN-Projects/rocksdb.replicated,tsheasha/rocksdb,bbiao/rocksdb,ryneli/rocksdb,temicai/rocksdb,Andymic/rocksdb,geraldoandradee/rocksdb,kaschaeffer/rocksdb,ryneli/rocksdb,jalexanderqed/rocksdb,hobinyoon/rocksdb,Vaisman/rocksdb,JackLian/rocksdb,Andymic/rocksdb,JoeWoo/rocksdb,wat-ze-hex/rocksdb,msb-at-yahoo/rocksdb,mbarbon/rocksdb,zhangpng/rocksdb,JohnPJenkins/rocksdb,SunguckLee/RocksDB,norton/rocksdb,vashstorm/rocksdb,amyvmiwei/rocksdb,tsheasha/rocksdb,fengshao0907/rocksdb,makelivedotnet/rocksdb,RyanTech/rocksdb,norton/rocksdb,vashstorm/rocksdb,dkorolev/rocksdb,anagav/rocksdb,temicai/rocksdb,NickCis/rocksdb,Andymic/rocksdb,IMCG/RcoksDB,virtdb/rocksdb,jalexanderqed/rocksdb,vashstorm/rocksdb,IMCG/RcoksDB,virtdb/rocksdb,lgscofield/rocksdb,OverlordQ/rocksdb,OverlordQ/rocksdb,kaschaeffer/rocksdb,tschottdorf/rocksdb,luckywhu/rocksdb,Applied-Duality/rocksdb,vashstorm/rocksdb,JohnPJenkins/rocksdb,alihalabyah/rocksdb,wenduo/rocksdb,wskplho/rocksdb,zhangpng/rocksdb,biddyweb/rocksdb,dkorolev/rocksdb,skunkwerks/rocksdb,wlqGit/rocksdb,vmx/rocksdb,Vaisman/rocksdb,vmx/rocksdb,ylong/rocksdb,JoeWoo/rocksdb,tizzybec/rocksdb,sorphi/rocksdb,tschottdorf/rocksdb,wat-ze-hex/rocksdb,wat-ze-hex/rocksdb,amyvmiwei/rocksdb,lgscofield/rocksdb,wat-ze-hex/rocksdb,NickCis/rocksdb,lgscofield/rocksdb,bbiao/rocksdb,zhangpng/rocksdb,geraldoandradee/rocksdb,kaschaeffer/rocksdb,tizzybec/rocksdb,Vaisman/rocksdb,virtdb/rocksdb,luckywhu/rocksdb,wlqGit/rocksdb,JackLian/rocksdb,msb-at-yahoo/rocksdb,tizzybec/rocksdb,siddhartharay007/rocksdb,Andymic/rocksdb,facebook/rocksdb,IMCG/RcoksDB,wenduo/rocksdb,SunguckLee/RocksDB,mbarbon/rocksdb,OverlordQ/rocksdb,kaschaeffer/rocksdb,tschottdorf/rocksdb,SunguckLee/RocksDB,NickCis/rocksdb,caijieming-baidu/rocksdb,luckywhu/rocksdb,facebook/rocksdb,IMCG/RcoksDB,makelivedotnet/rocksdb,vashstorm/rocksdb,sorphi/rocksdb,wlqGit/rocksdb,tsheasha/rocksdb,temicai/rocksdb,facebook/rocksdb,ryneli/rocksdb,luckywhu/rocksdb,luckywhu/rocksdb,msb-at-yahoo/rocksdb,sorphi/rocksdb,biddyweb/rocksdb,sorphi/rocksdb,virtdb/rocksdb,norton/rocksdb,mbarbon/rocksdb,JoeWoo/rocksdb,IMCG/RcoksDB,RyanTech/rocksdb,wskplho/rocksdb,OverlordQ/rocksdb,mbarbon/rocksdb,wenduo/rocksdb,tsheasha/rocksdb,Vaisman/rocksdb,JoeWoo/rocksdb,caijieming-baidu/rocksdb,biddyweb/rocksdb,alihalabyah/rocksdb,JohnPJenkins/rocksdb,dkorolev/rocksdb,kaschaeffer/rocksdb,RyanTech/rocksdb,jalexanderqed/rocksdb,lgscofield/rocksdb,tschottdorf/rocksdb,zhangpng/rocksdb,fengshao0907/rocksdb,wlqGit/rocksdb,siddhartharay007/rocksdb,RyanTech/rocksdb,Applied-Duality/rocksdb,wskplho/rocksdb,bbiao/rocksdb,temicai/rocksdb,JohnPJenkins/rocksdb,vmx/rocksdb,caijieming-baidu/rocksdb,amyvmiwei/rocksdb,luckywhu/rocksdb,alihalabyah/rocksdb,JackLian/rocksdb,OverlordQ/rocksdb,facebook/rocksdb,rDSN-Projects/rocksdb.replicated,geraldoandradee/rocksdb,SunguckLee/RocksDB,sorphi/rocksdb,virtdb/rocksdb,zhangpng/rocksdb,temicai/rocksdb,ylong/rocksdb,rDSN-Projects/rocksdb.replicated,norton/rocksdb,JoeWoo/rocksdb,vashstorm/rocksdb,facebook/rocksdb,NickCis/rocksdb,caijieming-baidu/rocksdb,mbarbon/rocksdb,biddyweb/rocksdb,fengshao0907/rocksdb,RyanTech/rocksdb,vmx/rocksdb,JackLian/rocksdb,makelivedotnet/rocksdb,anagav/rocksdb,rDSN-Projects/rocksdb.replicated,vashstorm/rocksdb,norton/rocksdb,JackLian/rocksdb,tizzybec/rocksdb,fengshao0907/rocksdb,facebook/rocksdb,biddyweb/rocksdb,makelivedotnet/rocksdb,siddhartharay007/rocksdb,skunkwerks/rocksdb,IMCG/RcoksDB,JackLian/rocksdb,amyvmiwei/rocksdb,anagav/rocksdb,caijieming-baidu/rocksdb,wlqGit/rocksdb,siddhartharay007/rocksdb,wenduo/rocksdb,JohnPJenkins/rocksdb,Applied-Duality/rocksdb,IMCG/RcoksDB,norton/rocksdb,jalexanderqed/rocksdb,luckywhu/rocksdb,vmx/rocksdb,hobinyoon/rocksdb,Andymic/rocksdb,facebook/rocksdb,skunkwerks/rocksdb,fengshao0907/rocksdb,siddhartharay007/rocksdb,JackLian/rocksdb,SunguckLee/RocksDB,anagav/rocksdb,kaschaeffer/rocksdb,tschottdorf/rocksdb,biddyweb/rocksdb,geraldoandradee/rocksdb,Andymic/rocksdb,Applied-Duality/rocksdb,virtdb/rocksdb,anagav/rocksdb,flabby/rocksdb,wat-ze-hex/rocksdb,hobinyoon/rocksdb,zhangpng/rocksdb,wlqGit/rocksdb,NickCis/rocksdb,lgscofield/rocksdb,skunkwerks/rocksdb,Vaisman/rocksdb,alihalabyah/rocksdb,fengshao0907/rocksdb,makelivedotnet/rocksdb,norton/rocksdb,bbiao/rocksdb,rDSN-Projects/rocksdb.replicated,geraldoandradee/rocksdb,sorphi/rocksdb,hobinyoon/rocksdb,makelivedotnet/rocksdb,msb-at-yahoo/rocksdb,rDSN-Projects/rocksdb.replicated,wat-ze-hex/rocksdb,ryneli/rocksdb,dkorolev/rocksdb,flabby/rocksdb,vmx/rocksdb,jalexanderqed/rocksdb,sorphi/rocksdb,msb-at-yahoo/rocksdb,wat-ze-hex/rocksdb