Update the clean and MSI scripts for VS2010

Tools/buildbot/buildmsi.bat

@@ -5,7 +5,7 @@ cmd /c Tools\buildbot\external.bat
 call "%VS100COMNTOOLS%vsvars32.bat"
 
 @rem build Python
-vcbuild /useenv PCbuild\pcbuild.sln "Release|Win32"
+msbuild /p:useenv=true PCbuild\pcbuild.sln /p:Configuration=Release /p:Platform=Win32
 
 @rem build the documentation
 bash.exe -c 'cd Doc;make PYTHON=python2.5 update htmlhelp'

Tools/buildbot/clean-amd64.bat

@@ -5,6 +5,6 @@ del /s Lib\*.pyc Lib\*.pyo
 @echo Deleting test leftovers ...
 rmdir /s /q build
 cd PCbuild
-vcbuild /clean pcbuild.sln "Release|x64"
-vcbuild /clean pcbuild.sln "Debug|x64"
+msbuild /target:clean pcbuild.sln /p:Configuration=Release /p:PlatformTarget=x64
+msbuild /target:clean pcbuild.sln /p:Configuration=Debug /p:PlatformTarget=x64
 cd ..

Tools/buildbot/clean.bat

@@ -5,6 +5,6 @@ del /s Lib\*.pyc Lib\*.pyo
 @echo Deleting test leftovers ...
 rmdir /s /q build
 cd PCbuild
-vcbuild /clean pcbuild.sln "Release|Win32"
-vcbuild /clean pcbuild.sln "Debug|Win32"
+msbuild /target:clean pcbuild.sln /p:Configuration=Release /p:PlatformTarget=x86
+msbuild /target:clean pcbuild.sln /p:Configuration=Debug /p:PlatformTarget=x86
 cd ..