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/unix/sysv/linux/tile/tilegx/ioctl.S b/ports/sysdeps/unix/sysv/linux/tile/tilegx/ioctl.S
deleted file mode 100644
index c12129958c..0000000000
--- a/ports/sysdeps/unix/sysv/linux/tile/tilegx/ioctl.S
+++ /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/>.  */
-
-
-/* TILE-Gx specifies that "unsigned int" is sign extended in the high
-   32 bits.  But since the userspace API claims to be "unsigned long",
-   calls into __ioctl() will not be sign extended, but rather pass all
-   64 bits of the argument.  Therefore, when we pass the "request"
-   value to the kernel, we must explicitly sign-extend it to match the
-   kernel's internal use of "unsigned int" as the second argument,
-   which we do by casting to "unsigned int".  */
-
-#include <sysdep.h>
-
-	.text
-ENTRY (__ioctl)
-	FEEDBACK_ENTER(__ioctl)
-	{
-	 addxi r1, r1, 0
-	 moveli TREG_SYSCALL_NR_NAME, __NR_ioctl
-	}
-	swint1
-	BNEZ r1, 0f
-	jrp lr
-PSEUDO_END (__ioctl)
-weak_alias (__ioctl, ioctl)