Added some missing atomics in FastClock
Added some missing atomics in FastClock

chandlerc/benchmark,nickhutchinson/benchmark-cxx03,chemhack/benchmark,quantumsteve/benchmark,bowlofstew/benchmark,nickhutchinson/benchmark,fuchsia-mirror/third_party-benchmark,gezidan/benchmark,bowlofstew/benchmark,everbase/benchmark,gezidan/benchmark,subailong/benchmark,dcoeurjo/benchmark,ntx-/benchmark,disconnect3d/benchmark,xlqian/benchmark,ntx-/benchmark,codygray/benchmark,nickhutchinson/benchmark-cxx03,LepelTsmok/benchmark,bowlofstew/benchmark,subailong/benchmark,LepelTsmok/benchmark,Photonomie/benchmark,xlqian/benchmark,subailong/benchmark,everbase/benchmark,mockingbirdnest/benchmark,mockingbirdnest/benchmark,everbase/benchmark,eliben/benchmark,chandlerc/benchmark,LepelTsmok/benchmark,fuchsia-mirror/third_party-benchmark,disconnect3d/benchmark,nickhutchinson/benchmark-cxx03,dcoeurjo/benchmark,chandlerc/benchmark,efcs/benchmark,codygray/benchmark,LepelTsmok/benchmark,mockingbirdnest/benchmark,ntx-/benchmark,quantumsteve/benchmark,codygray/benchmark,eliben/benchmark,disconnect3d/benchmark,quantumsteve/benchmark,eliben/benchmark,nickhutchinson/benchmark,gezidan/benchmark,google/benchmark,nickhutchinson/benchmark,gezidan/benchmark,Photonomie/benchmark,chandlerc/benchmark,dcoeurjo/benchmark,chemhack/benchmark,chemhack/benchmark,codygray/benchmark,fuchsia-mirror/third_party-benchmark,bowlofstew/benchmark,xlqian/benchmark,google/benchmark,google/benchmark,efcs/benchmark,eliben/benchmark,xlqian/benchmark,Photonomie/benchmark,everbase/benchmark,mockingbirdnest/benchmark,quantumsteve/benchmark,fuchsia-mirror/third_party-benchmark,efcs/benchmark,efcs/benchmark,Photonomie/benchmark,subailong/benchmark,disconnect3d/benchmark,nickhutchinson/benchmark-cxx03,nickhutchinson/benchmark,ntx-/benchmark,chemhack/benchmark