[PATCH] Speedup various nptl/tst-cancel20 and nptl/tst-cancel21 tests.

[Stefan Liebler]

Hi,

each of thease tests - tst-cancel20, tst-cancelx20, tst-cancel21,
tst-cancelx21 and tst-cancel21-static - runs for 8s.

do_one_test is called 4 times. Either in do_one_test (tst-cancel20.c)
or in tf (tst-cancel21.c) "sleep (1)" is called 2 times.

This patch reduces the sleep time. Using usleep (5ms) leads to a
runtime of one tst-cancel... invocation of roughly 40ms instead of 8s.
As the nptl tests run in sequence, this patch saves roughly 39s of
runtime for "make check".

Bye,
Stefan

ChangeLog:

	* nptl/tst-cancel20.c (do_one_test): Reduce sleep times.
	* nptl/tst-cancel21.c (tf): Likewise.
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