cairo-trace: Stringify CAIRO_STATUS_JBIG2_GLOBAL_MISSING

This error enum was added last September when JBIG2 support was added.
Support it as well in the tracing code.  This fixes this warning:

trace.c:1544:5: warning: enumeration value
‘CAIRO_STATUS_JBIG2_GLOBAL_MISSING’ not handled in switch [-Wswitch]

Signed-off-by: Bryce Harrington <b.harrington@samsung.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

util/cairo-trace/trace.c

@@ -1580,6 +1580,7 @@ _status_to_string (cairo_status_t status)
 	f(DEVICE_ERROR);
 	f(INVALID_MESH_CONSTRUCTION);
 	f(DEVICE_FINISHED);
+	f(JBIG2_GLOBAL_MISSING);
     case CAIRO_STATUS_LAST_STATUS:
 	break;
     }