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, 46 deletions

diff --git a/ports/sysdeps/tile/setjmp.S b/ports/sysdeps/tile/setjmp.S
deleted file mode 100644
index a2f34251a0..0000000000
--- a/ports/sysdeps/tile/setjmp.S
+++ /dev/null
@@ -1,46 +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 <sysdep.h>
-#include <jmpbuf-offsets.h>
-
-	.text
-
-	/* Keep traditional entry points in with sigsetjmp(). */
-ENTRY(setjmp)
-	{ movei r1, 1; j 1f }
-END(setjmp)
-
-ENTRY(_setjmp)
-	{ movei r1, 0; j 1f }
-END(_setjmp)
-libc_hidden_def (_setjmp)
-
-ENTRY(__sigsetjmp)
-	FEEDBACK_ENTER(__sigsetjmp)
-1:
-	move r2, r0
-
-#define SAVE(r) { ST r2, r ; ADDI_PTR r2, r2, REGSIZE }
-	FOR_EACH_CALLEE_SAVED_REG(SAVE)
-
-	mfspr r3, INTERRUPT_CRITICAL_SECTION
-	ST r2, r3
-	j plt(__sigjmp_save)
-	jrp lr   /* Keep the backtracer happy. */
-END(__sigsetjmp)