When running the build in a separate build directory, redirecting output
into a file can error out if the directory does not exist yet. Some
places already had `mkdir -p` calls, but not all.
Make all occurences of this consistently use `@$(MKDIR_P)`.
(Extension of PR #12575 to catch more places.)
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This just tries logging messages in random ways to allow the fuzzer to
do its thing and try to find weird edge cases.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
