[issue22919] Update PCBuild for VS 2015

[Steve Dower]

Steve Dower added the comment:

Oh, one other thing I just thought of: the current release of nmake (in VS 2015) has a regression that will make TCL and TK fail to build, but I have a workaround for their makefile. OpenSSL also had a problem with VC14 but their fix isn't in the build we've got on svn.python.org.

If possible, I'd like to get the workarounds into our sources for those before this is checked in, so that the buildbots (currently there's one that I know of with VS 2015 Preview installed) can pick up those fixes and won't fail because of these.

The nmake issue should be fixed for VS 2015 RC and the OpenSSL issue is already fixed (in their 1.1 branch, IIRC). I've attached a patch listing the changes needed.

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Added file: http://bugs.python.org/file37248/fixups.diff

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