libc/eglibc: does no longer support LinuxThreads

LinuxThreads are dead. Buried 6 feet under. Long forgotten.
Time for mourning has to come to an end.

But fear not, younster, for we have a great successor as NPTL!
Times for rejoicing have come, now!

LinuxThreads are dead. Long live NPTL!

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

 reporter_name="Benoît Thébaudeau"

 reporter_url="http://www.advansee.com/"

 reporter_comment="Cortex-A9 with NEON support using the hard-float GNU EABI."