Hi,

babeltrace 1.5 and babeltrace 2.0 both install the docDATA files in the
same directory, /usr/local/share/doc/babeltrace.
babeltrace 2.0 should install it into /usr/local/share/doc/babeltrace2

$ sudo make install-dist_docDATA
 /bin/mkdir -p '/usr/local/share/doc/babeltrace'
 /usr/bin/install -c -m 644 ChangeLog LICENSE mit-license.txt gpl-2.0.txt
lgpl-2.1.txt std-ext-lib.txt README.adoc CONTRIBUTING.adoc
'/usr/local/share/doc/babeltrace'

Best Regards
Anders Wallin