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, 64 deletions

diff --git a/ports/sysdeps/tile/tilegx/strchrnul.c b/ports/sysdeps/tile/tilegx/strchrnul.c
deleted file mode 100644
index 34c4317417..0000000000
--- a/ports/sysdeps/tile/tilegx/strchrnul.c
+++ /dev/null
@@ -1,64 +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 <string.h>
-#include <stdint.h>
-#include "string-endian.h"
-
-char *
-__strchrnul (const char *s, int c)
-{
-  int z, g;
-
-  /* Get an aligned pointer. */
-  const uintptr_t s_int = (uintptr_t) s;
-  const uint64_t *p = (const uint64_t *) (s_int & -8);
-
-  /* Create eight copies of the byte for which we are looking. */
-  const uint64_t goal = copy_byte(c);
-
-  /* Read the first aligned word, but force bytes before the string to
-     match neither zero nor goal (we make sure the high bit of each byte
-     is 1, and the low 7 bits are all the opposite of the goal byte).  */
-  const uint64_t before_mask = MASK (s_int);
-  uint64_t v = (*p | before_mask) ^ (goal & __insn_v1shrui (before_mask, 1));
-
-  uint64_t zero_matches, goal_matches;
-  while (1)
-    {
-      /* Look for a terminating '\0'. */
-      zero_matches = __insn_v1cmpeqi (v, 0);
-
-      /* Look for the goal byte. */
-      goal_matches = __insn_v1cmpeq (v, goal);
-
-      if (__builtin_expect ((zero_matches | goal_matches) != 0, 0))
-        break;
-
-      v = *++p;
-    }
-
-  z = CFZ (zero_matches);
-  g = CFZ (goal_matches);
-
-  /* Return a pointer to the NUL or goal, whichever is first. */
-  if (z < g)
-    g = z;
-  return ((char *) p) + (g >> 3);
-}
-weak_alias (__strchrnul, strchrnul)