[llvm] r337385 - ARM: switch armv7em triple to hard-float defaults and libcalls.

[Tim Northover via llvm-commits]

> Please revert this. 

Done, r337424.

> v7em doesn't imply the target has an FPU, and even if it did we shouldn't be messing with the ABI based on the target CPU.  (If you want to do something weird for MachO targets, that's okay, but this change affects ELF targets too.)

Sorry, I thought that v7em was (at the llvm::Triple level) like v7k/v7s and entirely an Apple fiction. I see that’s not quite right so I’ll limit the changes to MachO and add some tests for it.

Cheers.

Tim.
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