[COMMITTED, PATCH] Move AArch64 from ports to libc.

[Marcus Shawcroft]

Relocate AArch64 from ports to libc.

This patch moves the AArch64 port to the main sysdeps hierarchy.  The 
move is essentially:

   git mv ports/sysdeps/aarch64 sysdeps/aarch64
   git mv ports/sysdeps/unix/sysv/linux/aarch64 
sysdeps/unix/sysv/linux/aarch64

The README is updated and I've updated ChangeLog.aarch64 along the lines 
of the ARM move.  The AArch64 build has been tested to confirm that 
there were no changes in objdump -dr output of the shared objects.

2014-02-11  Marcus Shawcroft  <marcus.shawcroft@arm.com>

         * sysdeps/aarch64: Move directory from ports/sysdeps/aarch64.
         * sysdeps/unix/sysv/linux/aarch64: Move directory from
         ports/sysdeps/unix/sysv/linux/aarch64.
         * README: Update listing for aarch64*-*-linux-gnu.

ports/ChangeLog.aarch64:

This file describes changes to the AArch64 port while it was in the ports
add-on directory.  This port is no longer part of an add-on and so
future changes to it should be listed in the top-level ChangeLog file,
not here.

^L

2014-02-11  Marcus Shawcroft  <marcus.shawcroft@arm.com>

         * sysdeps/aarch64: Move directory to ../sysdeps/aarch64.
         * sysdeps/unix/sysv/linux/aarch64: Move directory to
         ../sysdeps/unix/sysv/linux/aarch64.

diff --git a/README b/README
index 79a74e1..1df2fef 100644
--- a/README
+++ b/README
@@ -24,6 +24,7 @@ installed for the pthread library to work correctly.

  The GNU C Library supports these configurations for using Linux kernels:

+       aarch64*-*-linux-gnu
         arm-*-linux-gnueabi
         i[4567]86-*-linux-gnu
         x86_64-*-linux-gnu      Can build either x86_64 or x32
@@ -44,7 +45,6 @@ The code for other CPU configurations supported by 
volunteers outside of
  the core glibc maintenance effort is contained in the `ports' add-on,
  located in the `ports' subdirectory of the source tree.

-       aarch64*-*-linux-gnu
         alpha*-*-linux-gnu
         hppa-*-linux-gnu        Not currently functional without patches.
         ia64-*-linux-gnu