Upgrade Windows python prebuilts to 3.8.5

Also add vc runtime dlls.

Built at:
http://fusion/1952e09f-9b72-4093-876a-95577147ce7f

Change-Id: I583988baa81a59d7bc7cf0689fbd5ceab1e17f29
diff --git a/Lib/platform.py b/Lib/platform.py
index 6fbb7b0..994d892 100644
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -395,9 +395,9 @@
     else:
         try:
             cvkey = r'SOFTWARE\Microsoft\Windows NT\CurrentVersion'
-            with winreg.OpenKeyEx(HKEY_LOCAL_MACHINE, cvkey) as key:
-                ptype = QueryValueEx(key, 'CurrentType')[0]
-        except:
+            with winreg.OpenKeyEx(winreg.HKEY_LOCAL_MACHINE, cvkey) as key:
+                ptype = winreg.QueryValueEx(key, 'CurrentType')[0]
+        except OSError:
             pass
 
     return release, version, csd, ptype