Move mips from ports to libc.

I've moved the MIPS port from ports to the main sysdeps hierarchy.
Beyond the README update, the move of the files was simply

git mv ports/sysdeps/mips sysdeps/mips
git mv ports/sysdeps/unix/mips sysdeps/unix/mips
git mv ports/sysdeps/unix/sysv/linux/mips sysdeps/unix/sysv/linux/mips

and in addition to the ChangeLog entries here, I put a note at the top
of ports/ChangeLog.mips similar to those in other files.

Tested that disassembly of installed shared libraries for mips is the
same before and after this patch (except for ld.so where paths in
assertions are involved, as for arm).

	* sysdeps/mips: Move directory from ports/sysdeps/mips.
	* sysdeps/unix/mips: Move directory from ports/sysdeps/unix/mips.
	* sysdeps/unix/sysv/linux/mips: Move directory from
	ports/sysdeps/unix/sysv/linux/mips.
	* README: Update listing for mips-*-linux-gnu and
	mips64-*-linux-gnu.

	* sysdeps/mips: Move directory to ../sysdeps/mips.
	* sysdeps/unix/mips: Move directory to ../sysdeps/unix/mips.
	* sysdeps/unix/sysv/linux/mips: Move directory to
	../sysdeps/unix/sysv/linux/mips.

1 files changed, 0 insertions, 89 deletions

diff --git a/ports/sysdeps/unix/sysv/linux/mips/bits/sigaction.h b/ports/sysdeps/unix/sysv/linux/mips/bits/sigaction.h
deleted file mode 100644
index c84b592fdb..0000000000
--- a/ports/sysdeps/unix/sysv/linux/mips/bits/sigaction.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/* The proper definitions for Linux/MIPS's sigaction.
-   Copyright (C) 1993-2014 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/>.  */
-
-#ifndef _SIGNAL_H
-# error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
-#endif
-
-/* Structure describing the action to be taken when a signal arrives.  */
-struct sigaction
-  {
-    /* Special flags.  */
-    unsigned int sa_flags;
-
-    /* Signal handler.  */
-#ifdef __USE_POSIX199309
-    union
-      {
-	/* Used if SA_SIGINFO is not set.  */
-	__sighandler_t sa_handler;
-	/* Used if SA_SIGINFO is set.  */
-	void (*sa_sigaction) (int, siginfo_t *, void *);
-      }
-    __sigaction_handler;
-# define sa_handler    __sigaction_handler.sa_handler
-# define sa_sigaction  __sigaction_handler.sa_sigaction
-#else
-    __sighandler_t sa_handler;
-#endif
-    /* Additional set of signals to be blocked.  */
-    __sigset_t sa_mask;
-
-    /* The ABI says here are two unused ints following. */
-    /* Restore handler.  */
-    void (*sa_restorer) (void);
-
-#if _MIPS_SZPTR < 64
-    int sa_resv[1];
-#endif
-  };
-
-/* Bits in `sa_flags'.  */
-/* Please note that some Linux kernels versions use different values for these
-   flags which is a bug in those kernel versions.  */
-#define SA_NOCLDSTOP  0x00000001 /* Don't send SIGCHLD when children stop.  */
-#define SA_NOCLDWAIT  0x00010000 /* Don't create zombie on child death.  */
-#define SA_SIGINFO    0x00000008 /* Invoke signal-catching function with
-				    three arguments instead of one.  */
-#if defined __USE_UNIX98 || defined __USE_MISC
-# define SA_ONSTACK   0x08000000 /* Use signal stack by using `sa_restorer'. */
-#endif
-#if defined __USE_UNIX98 || defined __USE_MISC || defined __USE_XOPEN2K8
-# define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler.  */
-# define SA_RESTART   0x10000000 /* Restart syscall on signal return.  */
-# define SA_NODEFER   0x40000000 /* Don't automatically block the signal when
-				    its handler is being executed.  */
-#endif
-#ifdef __USE_MISC
-# define SA_INTERRUPT 0x20000000 /* Historical no-op.  */
-
-/* Some aliases for the SA_ constants.  */
-# define SA_NOMASK    SA_NODEFER
-# define SA_ONESHOT   SA_RESETHAND
-# define SA_STACK     SA_ONSTACK
-#endif
-
-/* Values for the HOW argument to `sigprocmask'.  */
-#define SIG_NOP	      0		/* 0 is unused to catch errors */
-#define	SIG_BLOCK     1		/* Block signals.  */
-#define	SIG_UNBLOCK   2		/* Unblock signals.  */
-#define	SIG_SETMASK   3		/* Set the set of blocked signals.  */
-#ifdef __USE_MISC
-# define SIG_SETMASK32 256	/* Goodie from SGI for BSD compatibility:
-				   set only the low 32 bit of the sigset.  */
-#endif