update-rc.d: check also that symlinks are valid

Running:

update-rc.d -r /path/to/target/rootfs basename defaults

at do_rootfs time in package postinstall stage, when
/path/to/target/rootfs/etc/init.d/basename is a symlink and points to some path
on target (for example: /etc/init.d/basename.some_package), would fail and the
postinstall execution would be postponed for first boot, on target.

This patch adds the posibility to verify whether the file the symlink
points to actually exists in the target rootfs.

[YOCTO #3716]

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
lttng-ust: bump PE

The previous lttng-ust had a PE of "1" - that recipe was removed and
replaced with the lttng2-ust recipe, which was renamed back to
lttng-ust.  The new recipe had didn't define a PE so got the default
PE of 0 - this adds the PE back and gives it a value of "2", which
reflects the history and fixes the following error:

ERROR: Package version for package lttng-ust went backwards which
would break package feeds from (1:0.16-r1 to 0:2.1.0-r0)

Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
oprofile: add AArch64 support

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
sstate.bbclass: allow to disable sstate package creation

* building core-image-minimal-mtdutils with and without sstate packages enabled:
          with   without
  real     98m       95m
  user    212m      208m
  sys      26m       25m

* but this was tested on fast machine with TMPDIR on fast raid0 array
  so the impact is not so bad on simple image, but stuff like qt4 takes
  ages on our slow buildhost

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
netbase: remove networkmanager handling for qemu machines

* see http://lists.linuxtogo.org/pipermail/openembedded-core/2012-February/018279.html thread

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>