Upgrade Snappy, Protocol Buffers, and LevelDB.
Upgrade Snappy, Protocol Buffers, and LevelDB.

This is pending validation of fitness.

dmilstein/prometheus,datajet-io/prometheus,trigrass2/prometheus,ton31337/prometheus,fabric8io/prometheus,wndhydrnt/prometheus,dalanlan/prometheus,SaltedMan/prometheus-annotated,wrouesnel/prometheus,AlekSi/prometheus,datajet-io/prometheus,jmcfarlane/prometheus,jmcfarlane/prometheus,Stackdriver/stackdriver-prometheus,wndhydrnt/prometheus,kangwoo/prometheus,dpatel06/prometheus,kzittritsch/prometheus,tattsun/prometheus,cit-lab/prometheus,robbiet480/prometheus,tomwilkie/prometheus,kzittritsch/prometheus,smyrman/prometheus,prasincs/prometheus,abhishekamralkar/prometheus,jbdalido/prometheus,bluecmd/prometheus,justintung/prometheus,msiebuhr/prometheus,kangwoo/prometheus,tattsun/prometheus,datajet-io/prometheus,tomwilkie/prometheus,Stackdriver/stackdriver-prometheus,dsymonds/prometheus,msiebuhr/prometheus,q3k/prometheus,AlekSi/prometheus,robbiet480/prometheus,justintung/prometheus,PrFalken/prometheus,Dieterbe/prometheus,fabxc/prometheus,slok/prometheus,flier/prometheus,brian-brazil/prometheus,kangwoo/prometheus,flier/prometheus,bluecmd/prometheus,datajet-io/prometheus,wndhydrnt/prometheus,gesellix/prometheus,jmcfarlane/prometheus,mrwacky42/prometheus,alileza/prometheus,Conorbro/prometheus,abhishekamralkar/prometheus,brancz/prometheus,RobertKielty/prometheus,thachmai/prometheus,brancz/prometheus,alileza/prometheus,PrFalken/prometheus,sudhi-vm/prometheus,prasincs/prometheus,eliothedeman/prometheus,alileza/prometheus,trigrass2/prometheus,GoogleCloudPlatform/prometheus,yanghongkjxy/prometheus,rajthilakmca/prometheus,Colstuwjx/prometheus,gesellix/prometheus,amorken/prometheus,mrwacky42/prometheus,laushinka/prometheus,tattsun/prometheus,yanghongkjxy/prometheus,robbiet480/prometheus,ton31337/prometheus,smyrman/prometheus,Conorbro/prometheus,jimmidyson/prometheus,msiebuhr/prometheus,mtanda/prometheus,AlekSi/prometheus,dalanlan/prometheus,dmilstein/prometheus,PrFalken/prometheus,rajthilakmca/prometheus,dln/prometheus,dsymonds/prometheus,gottwald/prometheus,thachmai/prometheus,wrouesnel/prometheus,mtanda/prometheus,alileza/prometheus,prometheus/prometheus,prasincs/prometheus,SaltedMan/prometheus-annotated,jbdalido/prometheus,tattsun/prometheus,alileza/prometheus,iksaif/prometheus,Colstuwjx/prometheus,gcnonato/prometheus,jimmidyson/prometheus,gottwald/prometheus,dalanlan/prometheus,bluecmd/prometheus,sudhi-vm/prometheus,Gouthamve/prometheus,justintung/prometheus,agaoglu/prometheus,adamron1/prometheus,gesellix/prometheus,smyrman/prometheus,gcnonato/prometheus,wxdublin/prometheus,fabric8io/prometheus,SaltedMan/prometheus-annotated,Gouthamve/prometheus,hustbill/prometheus,fabric8io/prometheus,yanghongkjxy/prometheus,brian-brazil/prometheus,dpatel06/prometheus,GoogleCloudPlatform/prometheus,thachmai/prometheus,mrwacky42/prometheus,msiebuhr/prometheus,q3k/prometheus,amorken/prometheus,trigrass2/prometheus,agaoglu/prometheus,justintung/prometheus,prometheus/prometheus,kzittritsch/prometheus,smyrman/prometheus,dmilstein/prometheus,Colstuwjx/prometheus,SaltedMan/prometheus-annotated,JavierZunzunegui/prometheus,adamron1/prometheus,wxdublin/prometheus,fabric8io/prometheus,GoogleCloudPlatform/prometheus,eliothedeman/prometheus,keegancsmith/prometheus,Conorbro/prometheus,RobertKielty/prometheus,robbiet480/prometheus,fabxc/prometheus,wxdublin/prometheus,cit-lab/prometheus,dln/prometheus,ton31337/prometheus,PrFalken/prometheus,wrouesnel/prometheus,JavierZunzunegui/prometheus,JavierZunzunegui/prometheus,jmcfarlane/prometheus,fabxc/prometheus,Gouthamve/prometheus,q3k/prometheus,Dieterbe/prometheus,prometheus/prometheus,brancz/prometheus,sudhi-vm/prometheus,tomwilkie/prometheus,JavierZunzunegui/prometheus,gottwald/prometheus,adamron1/prometheus,cit-lab/prometheus,Colstuwjx/prometheus,wrouesnel/prometheus,slok/prometheus,eliothedeman/prometheus,q3k/prometheus,hustbill/prometheus,bluecmd/prometheus,gesellix/prometheus,iksaif/prometheus,Dieterbe/prometheus,sudhi-vm/prometheus,gcnonato/prometheus,nicr9/prometheus,amorken/prometheus,jimmidyson/prometheus,jbdalido/prometheus,tomwilkie/prometheus,fabxc/prometheus,cit-lab/prometheus,hustbill/prometheus,iksaif/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,amorken/prometheus,keegancsmith/prometheus,dln/prometheus,dsymonds/prometheus,kzittritsch/prometheus,GoogleCloudPlatform/prometheus,nicr9/prometheus,keegancsmith/prometheus,adamron1/prometheus,mtanda/prometheus,nicr9/prometheus,keegancsmith/prometheus,dmilstein/prometheus,AlekSi/prometheus,brian-brazil/prometheus,RobertKielty/prometheus,prometheus/prometheus,prasincs/prometheus,thachmai/prometheus,dln/prometheus,Stackdriver/stackdriver-prometheus,dpatel06/prometheus,agaoglu/prometheus,agaoglu/prometheus,mtanda/prometheus,abhishekamralkar/prometheus,yanghongkjxy/prometheus,slok/prometheus,ton31337/prometheus,trigrass2/prometheus,kangwoo/prometheus,Conorbro/prometheus,abhishekamralkar/prometheus,Gouthamve/prometheus,keegancsmith/prometheus,jbdalido/prometheus,hustbill/prometheus,eliothedeman/prometheus,laushinka/prometheus,gottwald/prometheus,rajthilakmca/prometheus,brancz/prometheus,laushinka/prometheus,flier/prometheus,RobertKielty/prometheus,rajthilakmca/prometheus,dsymonds/prometheus,Stackdriver/stackdriver-prometheus,slok/prometheus,iksaif/prometheus,gcnonato/prometheus,laushinka/prometheus