CHANGES: update with recent changes

	Fixes all over the tree and new features.

	Toolchains: Use -mcpu / -march instead of -mtune. Support

	additional ARC and sparc variants. Updated Code sourcery

	and Linaro external toolchains.

	Defconfigs: Freescale iMX6DL SabreSD, Minnowboard MAX, QEMU

	powerpc64 pseries added and a number of updates to the

	existing configurations.

	Infrastructure: Buildroot is now less noisy when built with

	the silent option (make -s).

	A number of package infrastructure variables have been renamed

	from *_OPT to *_OPTS for constency. Buildroot will complain if

	the old names are used to assist in updating out of tree

	packages.

	Fixes for host systems where bash isn't located in /bin, and

	older systems not supporting mktemp --tmpdir.

	Various cleanups of users/groups in the default skeleton.

	There is now an option to choose what shell /bin/sh points to.

	Documentation: Various updates to the user manual. The

	asciidoc documentation handling has now been extended so it

	can be used by (BR2_EXTERNAL) packages.

	Updated/fixed packages: acl, acpid, agentpp, aircrack-ng,

	alsa-lib, alsamixergui, alsa-utils, apitrace, apr, apr-util,

	argus, arptables, at, atftp, atk, attr, audiofile, aumix,