aclocal: add include dir such that custom macros are found.
aclocal: add include dir such that custom macros are found.

Signed-off-by: Peter Soetens <4b8373d016f277527198385ba72fda0feb5da015@thesourceworks.com>

orocos-toolchain/log4cpp,phamelin/orocos-log4cpp,orocos-toolchain/log4cpp,phamelin/orocos-log4cpp,phamelin/orocos-log4cpp,phamelin/orocos-log4cpp