This is so that we can require CMake 3.13 in order to use target_link_options in
a future change.

Bug: b/145758253
Change-Id: Ia01743395453160ae658cc507499a68a79d4eede
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/44088Tested-by: Antonio Maiorano <amaiorano@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>