* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.

Change the powerpc tests to use <support/test-driver.c>.
Also replace some of pthread calls to its xpthread equivalent.

Tested on ppc64le.

	* sysdeps/powerpc/test-get_hwcap.c: Use <support/test-driver.c>
	instead of test-skeleton.c.
	(do_test): Replaced pthread_create and pthread_join with
	xpthread_create and xpthread_join.  Use TEST_VERIFY_EXIT macro.
	Removed unneeded status variable.
	* sysdeps/powerpc/test-gettimebase.c: Use <support/test-driver.c>
	instead of test-skeleton.c.
	* sysdeps/powerpc/tst-tlsopt-powerpc.c: Likewise.

[BZ #13743]
A new class of installed headers has been documented for low-level
platform-specific functionality.  PowerPC added the first instance with a
function to provide time base register access (__ppc_get_timebase).  This
is required for applications that measure time at high frequencies with
high precision that can't afford a syscall.