Ben Gamari authored Dec 26, 2019 and Marge Bot committed Dec 30, 2019

As noted in #17606, Docker disallows the get_mempolicy syscall by
default. This caused numerous tests to fail under CI in the `debug_numa`
way. Avoid this by disabling the NUMA probing logic when --debug-numa is
in use, instead setting n_numa_nodes in RtsFlags.c.

Fixes #17606.