angstrom-next: Adapt to nativesdk renaming

Signed-off-by: Khem Raj <raj.khem@gmail.com>
base-files: remove ${sysconfdir}/tmpfiles.d/var-run.conf

Fix conflict with systemd's version of the same file causing errors at
do_rootfs like:

|  * check_data_file_clashes: Package systemd wants to install file /home/andreas/tmp/oe-core-eglibc/work/overo-angstrom-linux-gnueabi/xfce4-full-image/1.0-r0/rootfs/etc/tmpfiles.d/var-run.conf
|       But that file is already provided by package  * base-files
base-files: make PRINC work properly for multiple bbappends
angstrom: enable opengl for x86

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
update-rc.d: make PRINC work properly for multiple bbappends
angstrom: fix java versions

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
conf/distro/angstrom-next.conf: Pin kernel headers to 3.7

oe-core has moved up to 3.7 for kernel headers now

Signed-off-by: Khem Raj <raj.khem@gmail.com>