Install .ali files into multiarch paths and modify installed projects
accordingly.

Build-Depend: gprbuild.
* Use ./configure --enable-shared.
* Use Leading_Library_Options.
* Delegate C compilations.

Create a runtime and -dev binary package for each library,
rename the packages according to the Ada policy.
See libxmlada or libgnatcoll for examples.

Then switch to dh-ada-library.

Look at docs/Makefile.in install target for other things to install
  (gps plugin in for example).

Enable gnatcoll modules (support/ada.m4).
