Correction for the fix for Bug 3508 - Persistent storage support breaks Linux compatibility.
A 2nd `make install' will fail attempting to create symlink libnvmemmory.so already created by 1st install.
Install should pre-emptively delete it.
@rem Used by the buildbot "compile" step.
cmd /c Tools\buildbot\external-amd64.bat
call "%VS90COMNTOOLS%\..\..\VC\vcvarsall.bat" x86_amd64
cmd /c Tools\buildbot\clean-amd64.bat
vcbuild /useenv PCbuild\kill_python.vcproj "Debug|x64" && PCbuild\amd64\kill_python_d.exe
vcbuild PCbuild\pcbuild.sln "Debug|x64"