[PATCH] tests: Handle system-wide tunables in rseq tests

[DJ Delorie]

Michael Jeanson <mjeanson@efficios.com> writes:
> The testroot.pristine is not created in the build dir

$ make $PWD/testroot.pristine/install.stamp

The initial testroot isn't created unless you do a full test run - that
was an optimization we decided on back when, to save time.  Warning: it
isn't re-built if you run "make check" again either, you need to delete
and remake the install.stamp to update it during development.

Every test after that just rsync's the pristine root to the working root
as needed.