Prepare Windows installer for 2.2a1.

PCbuild/BUILDno.txt

@@ -33,6 +33,8 @@ How to change the Windows build number:
 
 Windows Python BUILD numbers
 ----------------------------
+  21    2.2a1       TENTATIVE
+        18-Jul-2001
   20    2.1.1       TENTATIVE
         20-Jul-2001
   19    2.1.1c1

PCbuild/python20.wse

 Document Type: WSE
 item: Global
   Version=5.0
-  Title=Python 2.2 pre-alpha
+  Title=Python 2.2 alpha 1
   Flags=00010100
   Languages=65 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   Japanese Font Name=MS Gothic
@@ -16,6 +16,7 @@ item: Global
   Patch Flags=0000000000000001
   Patch Threshold=85
   Patch Memory=4000
+  EXE Filename=Python-2.2a1.exe
   Variable Name1=_SYS_
   Variable Description1=System directory (where to find MSVCRT.DLL)
   Variable Default1=C:\Windows\System
@@ -66,7 +67,7 @@ item: End Block
 end
 item: Set Variable
   Variable=APPTITLE
-  Value=Python 2.2 pre-alpha
+  Value=Python 2.2a1
 end
 item: Set Variable
   Variable=GROUP

PCbuild/pythoncore.dsp

@@ -709,11 +709,11 @@ SOURCE=..\Modules\getbuildinfo.c
 
 !IF  "$(CFG)" == "pythoncore - Win32 Release"
 
-# ADD CPP /D BUILD=16
+# ADD CPP /D BUILD=21
 
 !ELSEIF  "$(CFG)" == "pythoncore - Win32 Debug"
 
-# ADD CPP /D BUILD=16
+# ADD CPP /D BUILD=21
 
 !ELSEIF  "$(CFG)" == "pythoncore - Win32 Alpha Debug"