Test different Appveyor MinGW installation
Test different Appveyor MinGW installation

nickhutchinson/benchmark,efcs/benchmark,ntx-/benchmark,disconnect3d/benchmark,disconnect3d/benchmark,google/benchmark,nickhutchinson/benchmark,everbase/benchmark,ntx-/benchmark,mockingbirdnest/benchmark,google/benchmark,fuchsia-mirror/third_party-benchmark,nickhutchinson/benchmark,codygray/benchmark,disconnect3d/benchmark,fuchsia-mirror/third_party-benchmark,codygray/benchmark,everbase/benchmark,nickhutchinson/benchmark-cxx03,codygray/benchmark,efcs/benchmark,efcs/benchmark,nickhutchinson/benchmark-cxx03,nickhutchinson/benchmark-cxx03,everbase/benchmark,fuchsia-mirror/third_party-benchmark,disconnect3d/benchmark,ntx-/benchmark,mockingbirdnest/benchmark,mockingbirdnest/benchmark,ntx-/benchmark,nickhutchinson/benchmark-cxx03,google/benchmark,nickhutchinson/benchmark,codygray/benchmark,efcs/benchmark,everbase/benchmark,mockingbirdnest/benchmark,fuchsia-mirror/third_party-benchmark