oe-core: bump revision a bit

ec8ae16 image_types.bbclass: use 4096 instead of 8192 bytes-per-inode
4e00554 license.bbclass: fix copying license directories failed
9981f76 lsbtest: fix comparison bashism
ca55e73 iproute2: de-bash its scripts to remove the bash dependency
a77984a libomxil: Fix link issue for gst-omx
33a352f grub: move xz to DEPENDS list from RDEPENDS list
7043618 avahi: handle SO_REUSEPORT not being available
e57a86a Revert "license.bbclass: fix copying license directories failed"

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