tests: Avoid skipping exectool tests.
* common/t-exectool.c (test_executing_true): Try also /usr/bin/true. (test_executing_false): Try also /usr/bin/false.
I then ran a test on all our test lab systems, and found that /bin/false is missing on DragonFlyBSD, FreeBSD, GhostBSD, HardenedBSD, Mac OS X, MidnightBSD, Minix, one version of MirBSD, NetBSD, OpenBSD, PacBSD, PCBSD, and TrueOS.
- Reported-by: Nelson H. F. Beebe
- Signed-off-by: Werner Koch <wk@gnupg.org>