Makefile.am: Adjust macros

Later version fo automake deprecate INCLUDES, merging it with the AM_CPPFLAGS
macro.  Sor lets do that here to avoid an autogen error

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
bumping irqbalance version to 1.0.8

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>