mkrockspecs: don't dereference the lyaml.load return table.
mkrockspecs: don't dereference the lyaml.load return table.

* src/mkrockspecs.in: Now that we expect the API to be consistent
for the next release of lyaml, no need to dereference the return
value of lyaml.load.

Signed-off-by: Gary V. Vaughan <f9023000f29773649f3850298becb9544b5fd6a9@gnu.org>

gvvaughan/slingshot