qa: test fs:upgrade when running upgrade suite

Sometimes this suite breaks because it's not usually tested when upgrade
suites are modified.

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>

diff --git a/qa/suites/upgrade/cephfs b/qa/suites/upgrade/cephfs
new file mode 120000 (symlink)
index 0000000..1ff68fa
--- /dev/null
+++ b/qa/suites/upgrade/cephfs
@@ -0,0 +1 @@
+.qa/suites/fs/upgrade/
\ No newline at end of file