Treat all tests as XFAIL_TESTS if zhfst support is disabled.
Treat all tests as XFAIL_TESTS if zhfst support is disabled.

hfst/hfst-ospell,hfst/hfst-ospell,bbqsrc/hfst-ospell,bbqsrc/hfst-ospell,hfst/hfst-ospell,bbqsrc/hfst-ospell