Test fails on Debian experimental reproducible builds

A recent build on the reproducible build machines with Debian experimental fails on one test.

util/num_cpus: 
  FAIL ../src/test/test_util.c:3689: assert(num OP_LE 16): 18 vs 16
  [num_cpus FAILED]

This test was added in commit 603cb712ef756dd700a52e837bcd643a96311ad6 which expects the maximum number of CPUs to be 16. The compute_num_cpus function only logs a message for machines with more than 16 CPUs but doesn't clamp the return value to 16. So there is a discrepancy between the implementation and the test. (Why is there a limit anyway?)

Furthermore, the preprocessor macro that defines the maximum number of CPUs isn't public and can't be used in tests leading to undefined magic numbers.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information