MFC note: tests/sys/kern/coredump_phnum_test.sh changes omitted

MFC r322214:

Make test scripts under tests/... non-executable

Executable bits should be set at install time instead of in the repo.
Setting executable bits on files triggers false positives with Phabricator.

MFC r304797,r305467,r305468,r305483:

r304797 (by jmmv):

Make use of Kyua's work directories.

Change the vnode tests to use the current directory when creating temporary
files, which we can assume is a volatile work directory, and then make the
kqueue_test.sh driver _not_ abandon the directory created by Kyua.

This makes the various kqueue tests independent of each other, and ensures
the temporary file is cleaned up on failure.

Problem spotted by asomers@ when reviewing D4254.

r305467:

Move tests/sys/kqueue/... to tests/sys/kqueue/libkqueue/...

This is being done to clearly distinguish the libkqueue tests
from the (soon to be imported) NetBSD tests.

r305468:

Port contrib/netbsd-tests/kernel/kqueue/... as tests/sys/kqueue/...

proc2_test must be skipped because the invariant tested
(`ke.fflags & NOTE_TRACKERR`) doesn't pass.

r305483:

Fix tests/sys/kqueue NetBSD tests on 32-bit platforms by using proper
format specifier for pointers when printing them out with printf(3)

Pointyhat to: ngie

Move tests/sys/kqueue/... to tests/sys/kqueue/libkqueue/...

This is being done to clearly distinguish the libkqueue tests
from the (soon to be imported) NetBSD tests.

MFC after: 58 days
Sponsored by: EMC / Isilon Storage Division

Make use of Kyua's work directories.

Change the vnode tests to use the current directory when creating temporary
files, which we can assume is a volatile work directory, and then make the
kqueue_test.sh driver _not_ abandon the directory created by Kyua.

This makes the various kqueue tests independent of each other, and ensures
the temporary file is cleaned up on failure.

Problem spotted by asomers@ when reviewing D4254.

Revert r288682

I meant to do this on ^/user/ngie/more-tests

Pointyhat to: ngie (use svn info next time...)

Integrate tools/regression/kqueue into the FreeBSD test suite as
tests/sys/kqueue

MFC after: 1 week

Integrate tools/regression/kqueue into the FreeBSD test suite as tests/sys/kqueue