Move arm from ports to libc.

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

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

and in addition to the ChangeLog entries here, I put a note at the top
of ports/ChangeLog.arm similar to that at the top of
ChangeLog.powerpc.  There is deliberately no NEWS change, as I think
it makes the most sense to put in a general note above all ports
having moved if we can achieve that for 2.20.

Tested that disassembly of installed shared libraries for arm is the
same before and after this patch, except for data (not instructions)
in ld.so (there are assertions in sysdeps/arm/dl-machine.h, and the
path by which that file is found, and so by which it appears in the
assertion message, changes as a result of the move).

	* sysdeps/arm: Move directory from ports/sysdeps/arm.
	* sysdeps/unix/arm: Move directory from ports/sysdeps/unix/arm.
	* sysdeps/unix/sysv/linux/arm: Move directory from
	ports/sysdeps/unix/sysv/linux/arm.
	* README: Update listing for arm-*-linux-gnueabi.

ports/ChangeLog.arm:
	* sysdeps/arm: Move directory to ../sysdeps/arm.
	* sysdeps/unix/arm: Move directory to ../sysdeps.arm.
	* sysdeps/unix/sysv/linux/arm: Move directory to
	../sysdeps/unix/sysv/linux/arm.

ChangeLog

@@ -1,5 +1,11 @@
 2014-02-08  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/arm: Move directory from ports/sysdeps/arm.
+	* sysdeps/unix/arm: Move directory from ports/sysdeps/unix/arm.
+	* sysdeps/unix/sysv/linux/arm: Move directory from
+	ports/sysdeps/unix/sysv/linux/arm.
+	* README: Update listing for arm-*-linux-gnueabi.
+
 	* README: Remove mention of am33.
 
 2014-02-07  Roland McGrath  <roland@hack.frob.com>

README

@@ -24,6 +24,7 @@ installed for the pthread library to work correctly.
 
 The GNU C Library supports these configurations for using Linux kernels:
 
+	arm-*-linux-gnueabi
 	i[4567]86-*-linux-gnu
 	x86_64-*-linux-gnu	Can build either x86_64 or x32
 	powerpc-*-linux-gnu	Hardware or software floating point, BE only.
@@ -40,7 +41,6 @@ located in the `ports' subdirectory of the source tree.
 
 	aarch64*-*-linux-gnu
 	alpha*-*-linux-gnu
-	arm-*-linux-gnueabi
 	hppa-*-linux-gnu	Not currently functional without patches.
 	ia64-*-linux-gnu
 	m68k-*-linux-gnu

ports/ChangeLog.arm

@@ -1,5 +1,17 @@
+This file describes changes to the ARM port while it was in the ports
+add-on directory.  This port is no longer part of an add-on and so
+future changes to it should be listed in the top-level ChangeLog file,
+not here.
+
+
+
 2014-02-08  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/arm: Move directory to ../sysdeps/arm.
+	* sysdeps/unix/arm: Move directory to ../sysdeps.arm.
+	* sysdeps/unix/sysv/linux/arm: Move directory to
+	../sysdeps/unix/sysv/linux/arm.
+
 	* sysdeps/unix/sysv/linux/arm/msgctl.c: Move from
 	sysdeps/unix/sysv/linux/alpha/msgctl.c instead of #include of that
 	file.