This may be fixed in the future, but since redefinition in OrcV2 requires more
manual work on the JIT client's part it was left out of the most recent update
to the tutorials.
Adding `default_target` fixed the build by excluding these tests... but
this excluded these tests from ever running!
The correct feature check is `default_triple`
These tests involve a JIT, and like other tests should have the
REQUIRE: default_triple present.
This allow to run `ninja check` without the host target configured
in.