Move tilegx, tilepro, and linux-generic from ports to libc.

I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy,
along with the linux-generic ports infrastructure.  Beyond the README
update, the move was just

    git mv ports/sysdeps/tile sysdeps/tile
    git mv ports/sysdeps/unix/sysv/linux/tile \
      sysdeps/unix/sysv/linux/tile
    git mv ports/sysdeps/unix/sysv/linux/generic \
      sysdeps/unix/sysv/linux/generic

I updated the relevant ChangeLogs along the lines of the ARM move
in commit c6bfe5c4d75 and tested the 64-bit tilegx build to confirm that
there were no changes in "objdump -dr" output in the shared objects.

1 files changed, 0 insertions, 41 deletions

diff --git a/ports/sysdeps/tile/nptl/pthreaddef.h b/ports/sysdeps/tile/nptl/pthreaddef.h
deleted file mode 100644
index f3997250d2..0000000000
--- a/ports/sysdeps/tile/nptl/pthreaddef.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <stdlib.h>
-#include <string.h>
-
-/* Default stack size.  */
-#define ARCH_STACK_DEFAULT_SIZE	(2 * 1024 * 1024)
-
-/* Required stack pointer alignment at beginning.  */
-#define STACK_ALIGN		16
-
-/* Minimal stack size after allocating thread descriptor and guard size.  */
-#define MINIMAL_REST_STACK	2048
-
-/* Alignment requirement for TCB.  */
-#define TCB_ALIGNMENT		16
-
-
-/* Location of current stack frame.  */
-#define CURRENT_STACK_FRAME	__builtin_frame_address (0)
-
-/* XXX Until we have a better place keep the definitions here.  */
-
-#define __exit_thread_inline(val) \
-  INLINE_SYSCALL (exit, 1, (val))