add test-coroutine to checks

There is a "test-coroutine" which isn't in the list.
Add it so "make check" runs it too.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

configure

@@ -2669,7 +2669,7 @@ if test "$softmmu" = yes ; then
     fi
     if [ "$check_utests" = "yes" ]; then
       checks="check-qint check-qstring check-qdict check-qlist"
-      checks="check-qfloat check-qjson $checks"
+      checks="check-qfloat check-qjson test-coroutine $checks"
     fi
   fi
 fi