misc/43644: TESTS_SUBDIR/atf-run interaction is too fragile

[pooka%iki.fi@localhost]

>Number:         43644
>Category:       misc
>Synopsis:       TESTS_SUBDIR/atf-run interaction is too fragile
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 20 15:20:00 +0000 2010
>Originator:     Antti Kantee
>Release:        
>Organization:
>Environment:
>Description:
Using TESTS_SUBDIR for a subdirectory which contains only supporting
routines and no tests causes atf-run to fail completely.
>How-To-Repeat:
Add new subdir to TESTS_SUBDIR without thinking, observe things break.
>Fix: