package/irqbalance: bump to version 1.5.0

package/irqbalance: bump to version 1.5.0

>From the upstream changelog:

New Features in irqbalance 1.5.0
* file based socket ipc mechanism
* support for multiple policy scripts
* add some sandboxing support
* enhanced debug output
* Imroved irq type determination for ARM
Bugs fixed:
* Fixed xen event interrupt detection
* Fix node parsing in sysfs
* Covscan fixes
* Fix use on systems without a pci bus
* Various other cleanups

Signed-off-by: Florian La Roche <F.LaRoche@pilz.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>