gnutls: security bump to version 3.2.15

Fixes GNUTLS-SA-2014-3 (CVE-2014-3466).

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
toolchain-external: restrict Musl external toolchain to Microblaze BE

As reported by William Welch <bvwelch@gmail.com>, the Musl external
toolchain provided by the musl-cross project is only Microblaze
big-endian. In fact, Musl seems to only support the big endian variant
of the Microblaze architecture, with the microblaze-* tuple.

This commit makes sure the Musl pre-built external toolchain provided
by musl-cross can only be selected for a big-endian Microblaze
configuration.

Reported-by: William Welch <bvwelch@gmail.com>
Cc: William Welch <bvwelch@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
toolchain-buildroot: only allow the selection of Musl for Microblaze BE

The Musl C library only supports Microblaze BE, not Microblaze LE, so
this commit adjusts the dependencies of the toolchain-buildroot
package to not allow the selection of Musl on Microblaze LE.

Cc: William Welch <bvwelch@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
glibc: doesn't build for PowerPC SPE

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
qt5webkit: needs host-flex

Fixes http://autobuild.buildroot.net/results/dbe/dbe4e8f7b7ddd8ab3fdc1a6f41d775b3c8132160/

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
manual/make-tips.txt: busybox doesn't have a savedefconfig target

So don't mention it here.

Reported-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Update for 2014.05

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Merge tag '2014.05' into next

Release 2014.05