Update irqbalance to version 1.9.4.
* refresh version in meson patch
* remove EINVAL handling patch as upstream seems to have silenced
the log spam for unmanageable IRQs
Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
Fixes compilation when libiconv is missing.
Also remove pthread from glibc. No longer needed.
Cleanup Makefile for consistency between packages.
Signed-off-by: Rosen Penev <rosenp@gmail.com>