[PATCH] D29787: Upgrade ios min version to 8

[Kuba (Brecka) Mracek via Phabricator via llvm-commits]

kubamracek added a comment.

In https://reviews.llvm.org/D29787#675861, @fjricci wrote:

> Turns out that's a bit tricky, because we need a thread-local `AllocatorCache`, which is a complex type only defined in the allocator source files.


Move it to a header file.


https://reviews.llvm.org/D29787