MFC r289172,r290254:

r289172:

Refactor the test/ Makefiles after recent changes to bsd.test.mk (r289158) and
netbsd-tests.test.mk (r289151)

- Eliminate explicit OBJTOP/SRCTOP setting
- Convert all ad hoc NetBSD test integration over to netbsd-tests.test.mk
- Remove unnecessary TESTSDIR setting
- Use SRCTOP where possible for clarity

r290254:

Remove unused variable (SRCDIR)

MFC r272777,r272779,r272780,r272781,r272782,r272783,r272784,r272787,r272788:

r272777:

Integrate usr.sbin/nmtree/tests from NetBSD into atf/kyua

In collaboration with: pho
Sponsored by: EMC / Isilon Storage Division

r272779:

Integrate usr.sbin/basename/tests from NetBSD into atf/kyua

In collaboration with: pho
Sponsored by: EMC / Isilon Storage Division

r272780:

Integrate usr.bin/cmp/tests from NetBSD into atf/kyua

In collaboration with: sjg
Sponsored by: EMC / Isilon Storage Division

r272781:

Integrate usr.bin/dirname/tests from NetBSD into atf/kyua

In collaboration with: pho, sjg
Sponsored by: EMC / Isilon Storage Division

r272782:

Integrate bin/sleep/tests from NetBSD into atf/kyua

Sponsored by: EMC / Isilon Storage Division

r272783:

Integrate usr.bin/cut/tests from NetBSD into atf/kyua

Sponsored by: EMC / Isilon Storage Division

r272784:

Integrate usr.bin/grep/tests from NetBSD into atf/kyua

Sponsored by: EMC / Isilon Storage Division

r272787:

Integrate usr.bin/diff/tests from NetBSD into atf/kyua at gnu/usr.bin/diff/tests

Sponsored by: EMC / Isilon Storage Division

r272788:

Integrate usr.bin/gzip/tests from NetBSD into atf/kyua

Sponsored by: EMC / Isilon Storage Division

Integrate usr.sbin/basename/tests from NetBSD into atf/kyua

In collaboration with: pho
Sponsored by: EMC / Isilon Storage Division