[PATCH] [Sanitizers] Order initialization of coverage and guard arrays

[Kostya Serebryany]

> > Since there's no guarantee the first InitializeGuardArray() call comes after Init(), we have to make sure the coverage is initialized before we add a guard array.

> 


Could you please remind us why we can't guarantee this? 
(Better yet, add a test)


http://reviews.llvm.org/D6892

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