First version of build scripts for Windows/AMD64 (no external

components are built yet, and 'kill_python' is disabled).

Tools/buildbot/build-amd64.bat

+@rem Used by the buildbot "compile" step.
+REM cmd /c Tools\buildbot\external.bat
+call "%VS71COMNTOOLS%vsvars32.bat"
+REM cmd /q/c Tools\buildbot\kill_python.bat
+devenv.com /build ReleaseAMD64 PCbuild\pcbuild.sln

Tools/buildbot/clean-amd64.bat

+@rem Used by the buildbot "clean" step.
+REM call "%VS71COMNTOOLS%vsvars32.bat"
+cd PCbuild
+@echo Deleting .pyc/.pyo files ...
+python.exe rmpyc.py
+devenv.com /clean ReleaseAMD64 pcbuild.sln

Tools/buildbot/test-amd64.bat

+@rem Used by the buildbot "test" step.
+cd PCbuild
+call rt.bat -q -uall -rw