moving testsuite 1 level up

[DJ Delorie]

Where the testsuite is, and where it runs, are two different things.
If you put a testsuite anywhere other than a *subdirectory* under
winsup/cygwin/testsuite, dejagnu won't be able to run it.

Perhaps it's time to update Maekfile.common to use some $(UPTOP)
(defined to ".." in most cases) variable?

Don't forget that testsuites are run with "make check" and should be
integrated into dejagnu.