[PATCH] [ASan] Test churn for setting ASAN_OPTIONS=symbolize_vs_style=false

[Filipe Cabecinhas]

(I said on IRC, but I'll repeat to have it included in the thread)

env ASAN_OPTIONS+=blah=true
doesn't work on Windows, unfortunately.

I can change it to either (I think any of these would be preferable to the
current patch):

- use Reid's idea of making a (yet another) single purpose utility

(llvm-env)

- use expansion (ASAN_OPTIONS=$ASAN_OPTIONS:...) instead of spelling out

symbolize_vs_style=true again (I didn't think about this one)

- change lit's shell, if we're sure that's the one that's being used.

Thanks,

  Filipe


http://reviews.llvm.org/D10294

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