selftest/runtime_test/virgl: Disable for all fedora

We can't support vgem on RHEL derived distros so disable this test for
all fedora hosts rather than specific versions.

(From OE-Core rev: c4760d6a52011515b0f931d08f619c7e49e72158)

Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/lib/oeqa/selftest/cases/runtime_test.py

@@ -258,7 +258,7 @@ class TestImage(OESelftestTestCase):
 
         distro = oe.lsb.distro_identifier()
         if distro and (distro in ['debian-9', 'debian-10', 'centos-7', 'centos-8', 'ubuntu-16.04', 'ubuntu-18.04'] or
-            distro.startswith('almalinux') or distro.startswith('rocky')):
+            distro.startswith('almalinux') or distro.startswith('fedora') or distro.startswith('rocky')):
             self.skipTest('virgl headless cannot be tested with %s' %(distro))
 
         render_hint = """If /dev/dri/renderD* is absent due to lack of suitable GPU, 'modprobe vgem' will create one suitable for mesa llvmpipe software renderer."""