tests: (waitpid) move waitpid tests to a dedicated subdir

Moving tests for waitpid(1) in tests/ts/misc to its own
subdirectory, namely tests/ts/waitpid, makes it possible
to add more extensive tests without cluttering tests/ts/misc
and makes the directory structure more coherent.

Signed-off-by: Christian Goeschel Ndjomouo <cgoesc2@wgu.edu>

diff --git a/tests/expected/misc/waitpid-count b/tests/expected/waitpid/waitpid-count
similarity index 100%
rename from tests/expected/misc/waitpid-count
rename to tests/expected/waitpid/waitpid-count

diff --git a/tests/expected/misc/waitpid-count.err b/tests/expected/waitpid/waitpid-count.err
similarity index 100%
rename from tests/expected/misc/waitpid-count.err
rename to tests/expected/waitpid/waitpid-count.err

diff --git a/tests/expected/misc/waitpid-exited.err b/tests/expected/waitpid/waitpid-exited.err
similarity index 100%
rename from tests/expected/misc/waitpid-exited.err
rename to tests/expected/waitpid/waitpid-exited.err

diff --git a/tests/expected/misc/waitpid-normal b/tests/expected/waitpid/waitpid-normal
similarity index 100%
rename from tests/expected/misc/waitpid-normal
rename to tests/expected/waitpid/waitpid-normal

diff --git a/tests/expected/misc/waitpid-timeout b/tests/expected/waitpid/waitpid-timeout
similarity index 100%
rename from tests/expected/misc/waitpid-timeout
rename to tests/expected/waitpid/waitpid-timeout

diff --git a/tests/ts/misc/waitpid b/tests/ts/waitpid/waitpid
similarity index 100%
rename from tests/ts/misc/waitpid
rename to tests/ts/waitpid/waitpid