Update ART for LLVM merge up to r187914.

Removed NoFramePointerElimNonLeaf because this is now only specified via
a function attribute (and thus covered by existing cases).

Switch to llvm::sys::fs::F_* enums.

Remove unused DisableSimplifyLibCalls().

Change-Id: I792e3a31f5dc289459aeacac995e7c828b6063d3
2 files changed