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, 49 deletions

diff --git a/ports/sysdeps/tile/sotruss-lib.c b/ports/sysdeps/tile/sotruss-lib.c
deleted file mode 100644
index 6681770ec5..0000000000
--- a/ports/sysdeps/tile/sotruss-lib.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/* Override generic sotruss-lib.c to define actual functions for tile.
-   Copyright (C) 2012-2014 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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/>.  */
-
-#define HAVE_ARCH_PLTENTER
-#define HAVE_ARCH_PLTEXIT
-
-#include <elf/sotruss-lib.c>
-
-ElfW(Addr)
-la_tile_gnu_pltenter (ElfW(Sym) *sym __attribute__ ((unused)),
-		      unsigned int ndx __attribute__ ((unused)),
-		      uintptr_t *refcook, uintptr_t *defcook,
-		      La_tile_regs *regs, unsigned int *flags,
-		      const char *symname, long int *framesizep)
-{
-  print_enter (refcook, defcook, symname,
-	       regs->lr_reg[0], regs->lr_reg[1], regs->lr_reg[2],
-	       *flags);
-
-  /* No need to copy anything, we will not need the parameters in any case.  */
-  *framesizep = 0;
-
-  return sym->st_value;
-}
-
-unsigned int
-la_tile_gnu_pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
-		     uintptr_t *defcook, const struct La_tile_regs *inregs,
-		     struct La_tile_retval *outregs, const char *symname)
-{
-  print_exit (refcook, defcook, symname, outregs->lrv_reg[0]);
-
-  return 0;
-}