[PATCH] Add new LLVM_OPTIMIZED_TABLEGEN build setting which configures, builds and uses a release tablegen build when LLVM is configured with assertions enabled.

[Reid Kleckner]

This is the first time I looked at our cross-compling support, and I'd really rather just add -O2 -DNDEBUG to lib/Support, lib/TableGen, and utils/TableGen and call it good. Shelling back out to 'cmake --build' in another config is... pretty hacky.


http://reviews.llvm.org/D7349

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