[PATCH] D19611: [CMake] [Darwin] Use libtool instead of ar && ranlib

[Tim Northover via llvm-commits]

On 27 April 2016 at 12:15, Chris Bieneman via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> +    find_program(CMAKE_LIBTOOL NAMES libtool)

I've got GNU libtool in my $PATH (which doesn't support the -static
option). Would it be reasonable to add a "PATHS /usr/bin" here, or is
it my own silly fault for doing that?

Tim.