Fix build in case zlib not found
Fix build in case zlib not found

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