[lto] When determining the number of lto threads to use, take the minimum of ${BUILD_JOBS} and a heuristic that scales with the memory size of the machine.
[lto] When determining the number of lto threads to use, take the minimum of ${BUILD_JOBS} and a heuristic that scales with the memory size of the machine.

This ensures that even if we have a machine with a huge amount of ram, we
respect ${BUILD_JOBS}.

khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift