include: fix include installation path and missing logging.h file
include: fix include installation path and missing logging.h file

The installation path was wrong. The logging.h file was not being
installed.

telenoobie/libosmo-abis,osmocom/libosmo-abis,osmocom/libosmo-abis,osmobuntu/libosmo-abis,osmobuntu/libosmo-abis,osmobuntu/libosmo-abis,osmobuntu/libosmo-abis,telenoobie/libosmo-abis,osmocom/libosmo-abis