implement __str__ for all of the proxy stuff so we can actually print out a statistic.
implement __str__ for all of the proxy stuff so we can
actually print out a statistic.

--HG--
extra : convert_revision : 043be6bd729e74d2220c5ae8aa1fc739aa247715

cancro7/gem5,cancro7/gem5,gem5/gem5,KuroeKurose/gem5,joerocklin/gem5,aclifton/cpeg853-gem5,austinharris/gem5-riscv,sobercoder/gem5,gedare/gem5,samueldotj/TeeRISC-Simulator,SanchayanMaity/gem5,gedare/gem5,kaiyuanl/gem5,markoshorro/gem5,kaiyuanl/gem5,gem5/gem5,Weil0ng/gem5,Weil0ng/gem5,cancro7/gem5,TUD-OS/gem5-dtu,rallylee/gem5,samueldotj/TeeRISC-Simulator,rallylee/gem5,joerocklin/gem5,aclifton/cpeg853-gem5,rjschof/gem5,samueldotj/TeeRISC-Simulator,gedare/gem5,TUD-OS/gem5-dtu,qizenguf/MLC-STT,SanchayanMaity/gem5,aclifton/cpeg853-gem5,rjschof/gem5,aclifton/cpeg853-gem5,gedare/gem5,gem5/gem5,HwisooSo/gemV-update,rallylee/gem5,kaiyuanl/gem5,aclifton/cpeg853-gem5,cancro7/gem5,gem5/gem5,powerjg/gem5-ci-test,kaiyuanl/gem5,qizenguf/MLC-STT,KuroeKurose/gem5,zlfben/gem5,markoshorro/gem5,qizenguf/MLC-STT,yb-kim/gemV,markoshorro/gem5,joerocklin/gem5,HwisooSo/gemV-update,zlfben/gem5,gem5/gem5,cancro7/gem5,sobercoder/gem5,gedare/gem5,Weil0ng/gem5,briancoutinho0905/2dsampling,powerjg/gem5-ci-test,kaiyuanl/gem5,rjschof/gem5,austinharris/gem5-riscv,briancoutinho0905/2dsampling,TUD-OS/gem5-dtu,SanchayanMaity/gem5,KuroeKurose/gem5,SanchayanMaity/gem5,TUD-OS/gem5-dtu,joerocklin/gem5,Weil0ng/gem5,gem5/gem5,SanchayanMaity/gem5,yb-kim/gemV,HwisooSo/gemV-update,sobercoder/gem5,markoshorro/gem5,kaiyuanl/gem5,qizenguf/MLC-STT,sobercoder/gem5,samueldotj/TeeRISC-Simulator,joerocklin/gem5,yb-kim/gemV,markoshorro/gem5,SanchayanMaity/gem5,cancro7/gem5,powerjg/gem5-ci-test,yb-kim/gemV,briancoutinho0905/2dsampling,cancro7/gem5,SanchayanMaity/gem5,markoshorro/gem5,rallylee/gem5,rallylee/gem5,TUD-OS/gem5-dtu,powerjg/gem5-ci-test,briancoutinho0905/2dsampling,samueldotj/TeeRISC-Simulator,rallylee/gem5,Weil0ng/gem5,KuroeKurose/gem5,yb-kim/gemV,qizenguf/MLC-STT,rjschof/gem5,sobercoder/gem5,markoshorro/gem5,qizenguf/MLC-STT,powerjg/gem5-ci-test,HwisooSo/gemV-update,rjschof/gem5,HwisooSo/gemV-update,zlfben/gem5,kaiyuanl/gem5,HwisooSo/gemV-update,KuroeKurose/gem5,zlfben/gem5,austinharris/gem5-riscv,yb-kim/gemV,samueldotj/TeeRISC-Simulator,austinharris/gem5-riscv,aclifton/cpeg853-gem5,gem5/gem5,HwisooSo/gemV-update,joerocklin/gem5,rjschof/gem5,gedare/gem5,yb-kim/gemV,rallylee/gem5,briancoutinho0905/2dsampling,aclifton/cpeg853-gem5,zlfben/gem5,zlfben/gem5,sobercoder/gem5,austinharris/gem5-riscv,TUD-OS/gem5-dtu,Weil0ng/gem5,austinharris/gem5-riscv,Weil0ng/gem5,yb-kim/gemV,samueldotj/TeeRISC-Simulator,KuroeKurose/gem5,briancoutinho0905/2dsampling,KuroeKurose/gem5,qizenguf/MLC-STT,powerjg/gem5-ci-test,rjschof/gem5,briancoutinho0905/2dsampling,sobercoder/gem5,joerocklin/gem5,joerocklin/gem5,austinharris/gem5-riscv,gedare/gem5,TUD-OS/gem5-dtu,zlfben/gem5,powerjg/gem5-ci-test