[PATCH] [LTOCodeGenerator] Iterate over all subtargets when collecting runtime library names that should be protected

[Eric Christopher]

Seems reasonable. Please add a block comment to the accumulateAndSortLibcalls explaining what it's there for and a brief comment over CodeGen.setCpu explaining that we're setting the cpu (and the underneath attrs) for the default target/subtarget for the module.

Thanks!

-eric


http://reviews.llvm.org/D7275

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