test.mk: don't use a temporary random.bin

Sometimes using a temp file to make test-random.h breaks builds because
clean and test get made in parallel.

Since debugging parallel make is anything but easy, it's better to just
not use the intermediate file.  This patch makes it use a pipe instead.
Because we live in the worst possible world, we have to support RHEL 9,
in which xxd does not support "-n prefix", and so we have to build the
header variable definition lines in shell.

Signed-off-by: Peter Jones <pjones@redhat.com>

0 files changed, 0 insertions, 0 deletions