bpo-31340: Change to building with MSVC v141 (included with Visual Studio 2017) (#3311)

diff --git a/PCbuild/python.vcxproj b/PCbuild/python.vcxproj
index 2786ac2..ab9fb05 100644
--- a/PCbuild/python.vcxproj
+++ b/PCbuild/python.vcxproj
@@ -96,6 +96,7 @@
     <PropertyGroup>
       <_PGOPath Condition="$(Configuration) == 'PGInstrument' and $(Platform) == 'Win32'">@set PATH=%PATH%%3B$(VCInstallDir)bin</_PGOPath>
       <_PGOPath Condition="$(Configuration) == 'PGInstrument' and $(Platform) == 'x64'">@set PATH=%PATH%%3B$(VCInstallDir)bin\amd64</_PGOPath>
+      <_PGOPath Condition="$(Configuration) == 'PGInstrument' and $(VC_PGO_RunTime_Dir) != ''">@set PATH=%PATH%%3B$(VC_PGO_RunTime_Dir)</_PGOPath>
       <_Content>@rem This script invokes the most recently built Python with all arguments
 @rem passed through to the interpreter.  This file is generated by the
 @rem build process and any changes *will* be thrown away by the next