Import bmake-20240508

Intersting/relevant changes since bmake-20240430

ChangeLog since bmake-20240430

2024-05-07 Simon J Gerraty <sjg@beast.crufty.net>

• VERSION (_MAKE_VERSION): 20240508

Merge with NetBSD make, pick up
o make: ensure variables set on command line get added to
.MAKEOVERRIDES (even if they start with '.') so they are passed to
sub-makes.

mk/ChangeLog since bmake-20240430

2024-05-04 Simon J Gerraty <sjg@beast.crufty.net>

• install-mk (MK_VERSION): 20240504

• dirdeps.mk: allow BUILD_DIRDEPS_OVERRIDES to pass overrides to

sub-make building DIRDEPS_CACHE.