Add an option to build with the 10.0.14393 SDK

build/vs_toolchain.py

Index: build/vs_toolchain.py
diff --git a/build/vs_toolchain.py b/build/vs_toolchain.py
index 9c55984e2f698b903b6c7a57fa51847ee81cf55f..c768a8a74bffe7fcbb5780d59540eb926f45955a 100755
--- a/build/vs_toolchain.py
+++ b/build/vs_toolchain.py
@@ -305,8 +305,12 @@ def _GetDesiredVsToolchainHashes():
   """Load a list of SHA1s corresponding to the toolchains that we want installed
   to build with."""
   if GetVisualStudioVersion() == '2015':
-    # Update 3 final with patches with 10.0.10586.0 SDK.
-    return ['d5dc33b15d1b2c086f2f6632e2fd15882f80dbd3']
+    if bool(int(os.environ.get('DEPOT_TOOLS_WIN_SDK_PRERELEASE', '0'))):
+      # Update 3 final with patches with 10.0.14393 SDK.
+      return ['d3cb0e37bdd120ad0ac4650b674b09e81be45616']
+    else:
+      # Update 3 final with patches with 10.0.10586.0 SDK.
+      return ['d5dc33b15d1b2c086f2f6632e2fd15882f80dbd3']
   else:

[scottmg, 2016/11/10 01:30:01]

Maybe delete the 2013 hash while you're at it.

     return ['03a4e939cd325d6bc5216af41b92d02dda1366a6']