Revert r357504, r357491, r357482 because of bot breakage.

Revert r357504, r357491, r357482 because of bot breakage.

See discussion in https://reviews.llvm.org/D60001.

Revert Clean up windows build bot.
This reverts r357504 (git commit 380c2420ecb0c3e809b04f385d37b89800df1ecf)
Revert Fix buildbot where paths were not matching up.
This reverts r357491 (git commit 5050586860140b55a0cc68c77dd1438f44a23ca5)
Revert Allow partial UUID matching in Minidump core file plug-in
This reverts r357482 (git commit 838bba9c34bf1e5500c2e100327bc764afc8d367)

llvm-svn: 357534