Make the Windows tempdir default to something under the CI directory and explicitly create it.
Make the Windows tempdir default to something under the CI directory and explicitly create it.

Turns out, mktemp doesn't like being passed a non-existent directory.

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MOS_MIGRATED_REVID=115454169

mikelalcon/bazel,damienmg/bazel,dropbox/bazel,dropbox/bazel,LuminateWireless/bazel,snnn/bazel,bazelbuild/bazel,katre/bazel,meteorcloudy/bazel,safarmer/bazel,snnn/bazel,aehlig/bazel,whuwxl/bazel,akira-baruah/bazel,ButterflyNetwork/bazel,iamthearm/bazel,juhalindfors/bazel-patches,mikelalcon/bazel,LuminateWireless/bazel,aehlig/bazel,damienmg/bazel,safarmer/bazel,ulfjack/bazel,akira-baruah/bazel,mbrukman/bazel,davidzchen/bazel,UrbanCompass/bazel,spxtr/bazel,hermione521/bazel,mikelikespie/bazel,ulfjack/bazel,werkt/bazel,dslomov/bazel,variac/bazel,kchodorow/bazel-1,anupcshan/bazel,UrbanCompass/bazel,dropbox/bazel,ButterflyNetwork/bazel,zhexuany/bazel,hermione521/bazel,akira-baruah/bazel,twitter-forks/bazel,zhexuany/bazel,snnn/bazel,dslomov/bazel-windows,whuwxl/bazel,iamthearm/bazel,perezd/bazel,aehlig/bazel,variac/bazel,mikelalcon/bazel,mbrukman/bazel,dslomov/bazel,ButterflyNetwork/bazel,juhalindfors/bazel-patches,perezd/bazel,Asana/bazel,safarmer/bazel,anupcshan/bazel,aehlig/bazel,snnn/bazel,perezd/bazel,damienmg/bazel,Asana/bazel,anupcshan/bazel,whuwxl/bazel,iamthearm/bazel,katre/bazel,dslomov/bazel,werkt/bazel,twitter-forks/bazel,ulfjack/bazel,perezd/bazel,dslomov/bazel,juhalindfors/bazel-patches,dslomov/bazel,zhexuany/bazel,mbrukman/bazel,UrbanCompass/bazel,dslomov/bazel,Asana/bazel,UrbanCompass/bazel,iamthearm/bazel,kchodorow/bazel,aehlig/bazel,katre/bazel,twitter-forks/bazel,LuminateWireless/bazel,cushon/bazel,variac/bazel,meteorcloudy/bazel,perezd/bazel,cushon/bazel,dropbox/bazel,bazelbuild/bazel,dslomov/bazel-windows,kchodorow/bazel-1,katre/bazel,katre/bazel,perezd/bazel,werkt/bazel,abergmeier-dsfishlabs/bazel,spxtr/bazel,anupcshan/bazel,akira-baruah/bazel,davidzchen/bazel,spxtr/bazel,iamthearm/bazel,davidzchen/bazel,meteorcloudy/bazel,bazelbuild/bazel,dropbox/bazel,cushon/bazel,aehlig/bazel,snnn/bazel,ulfjack/bazel,abergmeier-dsfishlabs/bazel,juhalindfors/bazel-patches,dslomov/bazel-windows,twitter-forks/bazel,safarmer/bazel,mrdomino/bazel,abergmeier-dsfishlabs/bazel,mikelikespie/bazel,davidzchen/bazel,mikelalcon/bazel,ButterflyNetwork/bazel,safarmer/bazel,bazelbuild/bazel,spxtr/bazel,dslomov/bazel-windows,mbrukman/bazel,twitter-forks/bazel,spxtr/bazel,Asana/bazel,LuminateWireless/bazel,meteorcloudy/bazel,kchodorow/bazel,UrbanCompass/bazel,damienmg/bazel,hermione521/bazel,cushon/bazel,zhexuany/bazel,bazelbuild/bazel,UrbanCompass/bazel,hermione521/bazel,snnn/bazel,anupcshan/bazel,abergmeier-dsfishlabs/bazel,LuminateWireless/bazel,mbrukman/bazel,hermione521/bazel,davidzchen/bazel,kchodorow/bazel-1,juhalindfors/bazel-patches,damienmg/bazel,whuwxl/bazel,ulfjack/bazel,mbrukman/bazel,davidzchen/bazel,variac/bazel,meteorcloudy/bazel,mikelalcon/bazel,twitter-forks/bazel,spxtr/bazel,juhalindfors/bazel-patches,twitter-forks/bazel,kchodorow/bazel-1,zhexuany/bazel,variac/bazel,bazelbuild/bazel,spxtr/bazel,kchodorow/bazel-1,kchodorow/bazel,damienmg/bazel,perezd/bazel,kchodorow/bazel-1,meteorcloudy/bazel,cushon/bazel,mrdomino/bazel,davidzchen/bazel,kchodorow/bazel,safarmer/bazel,werkt/bazel,damienmg/bazel,juhalindfors/bazel-patches,akira-baruah/bazel,abergmeier-dsfishlabs/bazel,mikelikespie/bazel,dslomov/bazel-windows,anupcshan/bazel,hermione521/bazel,akira-baruah/bazel,LuminateWireless/bazel,variac/bazel,kchodorow/bazel,mrdomino/bazel,kchodorow/bazel,Asana/bazel,ulfjack/bazel,werkt/bazel,snnn/bazel,zhexuany/bazel,whuwxl/bazel,mikelikespie/bazel,whuwxl/bazel,meteorcloudy/bazel,Asana/bazel,dslomov/bazel-windows,kchodorow/bazel,werkt/bazel,dropbox/bazel,mrdomino/bazel,aehlig/bazel,mrdomino/bazel,ulfjack/bazel,iamthearm/bazel,mikelalcon/bazel,mikelikespie/bazel,katre/bazel,Asana/bazel,mikelikespie/bazel,mrdomino/bazel,ButterflyNetwork/bazel,dslomov/bazel,ButterflyNetwork/bazel,abergmeier-dsfishlabs/bazel,cushon/bazel,variac/bazel