nitrogen6x_defconfig: bump u-boot / linux versions to current stable

As described on http://boundarydevices.com/u-boot-branches-for-i-mx6-april-2013/

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
tinyhttpd: needs mmu

Fixes:
http://autobuild.buildroot.net/results/2a3b5ab3ef58443c1bf86df5498df2f145cd840c/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
radvd: needs host-bison

Fixes:
http://autobuild.buildroot.net/results/849c48029ba77789f33ff726c5a33cd959200e38/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
zeromq: needs threads

Fixes:
http://autobuild.buildroot.net/results/11a1c085e3f5c490cbf3fec8f26169ade29f7363/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
kernel-headers: bump 3.{0, 4, 8}.x stable version and EOL 3.7.x series

The 3.7.x series is EOLed upstream so match that marking it as
deprecated.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
linux: bump 3.8.x stable version

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
mpg123: bump to version 1.15.3

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
toolchain-external: update ARM Linaro toolchains

Add the ARM Linaro toolchains 2013.02 and 2013.03, remove 2012.11 and
2012.12.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
toolchain-external: update AArch64 Linaro toolchains

Add the AArch64 Linaro toolchains 2013.02 and 2013.03, remove 2012.11
and 2012.12.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
toolchain-external: fix typo in Blackfin toolchain config option

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
collectd: bump to version 5.1.3

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Merge branch 'master' of git://git.buildroot.net/buildroot