irqbalance: add package

The purpose of irqbalance is to distribute hardware interrupts across
processors/cores on a multiprocessor/-core system in order to increase
performance.

This initial implementation of the package uses external glib2,
which is a large dependency.
Only the cmd-line tool is compiled and installed.

Run-tested with ipq806x / R7800.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

utils/irqbalance/patches/100-disable-ui-compilation.patch

@@ -0,0 +1,18 @@
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -29,14 +29,10 @@
+ AM_CPPFLAGS = -I${top_srcdir} -W -Wall -Wshadow -Wformat -Wundef -D_GNU_SOURCE
+ noinst_HEADERS = bitmap.h constants.h cpumask.h irqbalance.h non-atomic.h \
+ 	types.h $(UI_DIR)/helpers.h $(UI_DIR)/irqbalance-ui.h $(UI_DIR)/ui.h
+-sbin_PROGRAMS = irqbalance irqbalance-ui
++sbin_PROGRAMS = irqbalance
+ irqbalance_SOURCES = activate.c bitmap.c classify.c cputree.c irqbalance.c \
+ 	irqlist.c numa.c placement.c procinterrupts.c
+ irqbalance_LDADD = $(LIBCAP_NG_LIBS) $(GLIB_LIBS)
+-irqbalance_ui_SOURCES = $(UI_DIR)/helpers.c $(UI_DIR)/irqbalance-ui.c \
+-	$(UI_DIR)/ui.c
+-irqbalance_ui_LDADD = $(GLIB_LIBS) $(CURSES_LIBS)
+-dist_man_MANS = irqbalance.1
+ 
+ CONFIG_CLEAN_FILES = debug*.list config/*
+ clean-generic: