Add support for newer automake's.
Add support for newer automake's.

Patch provided by facebook, attribution is to one or more of:
Marc, Steve, Haiping Zhao, and Paul Saab, Steven Grimm, etc.

DSrcl/memcached,williamcheungthu/memcached,dianerdianer/memcached,tmharrisonwang/memcached,cloudrain21/memcached,zbase/moxi,13693100472/memcached,zbase/memcached,guikcd/memcached,alexandermerritt/memcached,EdwardLee03/memcached,dormando/memcached,xiaosl/memcached,Danzeer/memcached,daverigby/kv_engine,samanbarghi/memcached,tellapart/memcached,ClearwaterCore/memcached,mdounin/memcached,williamcheungthu/memcached,cloudrain21/memcached,EdwardLee03/memcached,cloudrain21/memcached,memcached/memcached,memcached/memcached,sagark/memcached-accel,zbase/moxi,tellapart/memcached,couchbase/memcached,sagark/memcached-accel,emcconville/memcached,abhinavdangeti/memcached,neutronsharc/memcached,allen8807/memcached-1,leverich/memcached-affinity,tmharrisonwang/memcached,elfchief/memcached,couchbase/memcached,elfchief/memcached,leedc/memcached,fengshao0907/memcached,Dhruva6/memcached,membase/moxi,DSrcl/memcached,zaycev/memcached,leverich/memcached-affinity,samt42/memcached,couchbase/moxi,dkrotx/memcached-dd,alexandermerritt/memcached,romanticode/memcached,osheroff/memcached_kdtree,dustin/memcached,couchbase/memcached,guikcd/memcached,msg7086/repcached,dkrotx/memcached-dd,mitliucak/memcached,gencer/memcached,leedc/memcached,mrkwse/memcached,amyvmiwei/memcached,romanticode/memcached,surajdharmapuram/memcached,Danzeer/memcached,zaycev/memcached,owendCB/memcached,rhli/memcached,EdwardLee03/memcached,emcconville/memcached,zbase/moxi,xiaosl/memcached,Metaswitch/memcached,leedc/memcached,Metaswitch/memcached,zbase/memcached,rhli/memcached,sagark/memcached-accel,zbase/memcached,tomykaira/memcached,surajdharmapuram/memcached,alexandermerritt/memcached,mdounin/memcached,owendCB/memcached,niaomingjian/memcached,williamcheungthu/memcached,steveyen/moxi,neutronsharc/memcached,13693100472/memcached,niaomingjian/memcached,allen8807/memcached-1,zbase/memcached,dianerdianer/memcached,gencer/memcached,samanbarghi/memcached,gencer/memcached,bpzhang/memcached,jeremiahyan/memcached,surajdharmapuram/memcached,tmharrisonwang/memcached,zbase/moxi,emcconville/memcached,DigitalAce/memcached,niaomingjian/memcached,bpzhang/memcached,daverigby/memcached,membase/moxi,amyvmiwei/memcached,surajdharmapuram/memcached,zbase/moxi,jbergstroem/memcached,jeremiahyan/memcached,neutronsharc/memcached,bpzhang/memcached,neutronsharc/memcached,sagark/memcached-accel,elfchief/memcached,jimwwalker/memcached,Metaswitch/memcached,EdwardLee03/memcached,samt42/memcached,samt42/memcached,rmccullagh/memcached,13693100472/memcached,angusfenying/memcached-win64,elfchief/memcached,msg7086/repcached,tomykaira/memcached,samanbarghi/memcached,samanbarghi/memcached,13693100472/memcached,ZhangZhenhua/memcached,niaomingjian/memcached,myPublicGit/memcached,rmccullagh/memcached,shelsonjava/memcached,fengshao0907/memcached,daverigby/memcached,dustin/memcached,couchbase/moxi,couchbase/moxi,13693100472/memcached,mrkwse/memcached,jeremiahyan/memcached,abhinavdangeti/memcached,Metaswitch/memcached,williamcheungthu/memcached,mrkwse/memcached,kamyu104/memcached,gencer/memcached,mitliucak/memcached,dormando/memcached,ClearwaterCore/memcached,myPublicGit/memcached,daverigby/kv_engine,romanticode/memcached,dkrotx/memcached-dd,membase/moxi,rmccullagh/memcached,couchbase/moxi,DigitalAce/memcached,dianerdianer/memcached,amyvmiwei/memcached,amyvmiwei/memcached,cloudrain21/memcached-1,tomykaira/memcached,rhli/memcached,owendCB/memcached,osheroff/memcached_kdtree,rhli/memcached,angusfenying/memcached-win64,DSrcl/memcached,memcached/memcached,membase/moxi,guikcd/memcached,tmharrisonwang/memcached,ZhangZhenhua/memcached,jimwwalker/memcached,daverigby/memcached,couchbase/moxi,DigitalAce/memcached,dkrotx/memcached-dd,membase/moxi,gencer/memcached,steveyen/moxi,xiaosl/memcached,Dhruva6/memcached,tomykaira/memcached,cloudrain21/memcached,fengshao0907/memcached,Metaswitch/memcached,owendCB/memcached,zaycev/memcached,mitliucak/memcached,mdounin/memcached,saumitra/memcached,guikcd/memcached,xiaosl/memcached,samt42/memcached,jbergstroem/memcached,dianerdianer/memcached,jbergstroem/memcached,cloudrain21/memcached-1,guikcd/memcached,sagark/memcached-accel,memcached/memcached,saumitra/memcached,ZhangZhenhua/memcached,leedc/memcached,shelsonjava/memcached,Distrotech/memcached,romanticode/memcached,mitliucak/memcached,angusfenying/memcached-win64,daverigby/kv_engine,ClearwaterCore/memcached,membase/moxi,steveyen/moxi,steveyen/moxi,allen8807/memcached-1,kamyu104/memcached,cloudrain21/memcached-1,ClearwaterCore/memcached,msg7086/repcached,dormando/memcached,jimwwalker/memcached,couchbase/memcached,memcached/memcached,shelsonjava/memcached,allen8807/memcached-1,Distrotech/memcached,Dhruva6/memcached,Danzeer/memcached,leverich/memcached-affinity,DSrcl/memcached,kamyu104/memcached,elfchief/memcached,jeremiahyan/memcached,Danzeer/memcached,zbase/memcached,abhinavdangeti/memcached,osheroff/memcached_kdtree,ZhangZhenhua/memcached,kamyu104/memcached,tellapart/memcached,Distrotech/memcached,mrkwse/memcached,rmccullagh/memcached,myPublicGit/memcached,abhinavdangeti/memcached,myPublicGit/memcached,angusfenying/memcached-win64,alexandermerritt/memcached,cloudrain21/memcached-1,emcconville/memcached,saumitra/memcached,bpzhang/memcached,shelsonjava/memcached,fengshao0907/memcached,msg7086/repcached,couchbase/moxi,dormando/memcached,dustin/memcached,daverigby/kv_engine,Dhruva6/memcached,abhinavdangeti/memcached,daverigby/memcached,zaycev/memcached,dormando/memcached,msg7086/repcached,rmccullagh/memcached,steveyen/moxi