check/generic/states.c: Add a sleep to ensure elements have a chance to start their...

check/generic/states.c: Add a sleep to ensure elements have a chance to start their pad tasks before shutdown. Reduce...

Original commit message from CVS:
* check/generic/states.c: (GST_START_TEST), (states_suite):
Add a sleep to ensure elements have a chance to start their
pad tasks before shutdown. Reduces racy test results.

* gst/elements/gstfdsrc.c: (gst_fdsrc_init), (gst_fdsrc_create):
Time out the select every now and then to check for shutdown.