Add an option to disable tests
* configure.ac: add an option to enable/disable building tests * Makefile.am: conditionally build tests
On an embeded device, there is no reason to have the tests present in
a production release build. Add a configure-time option to disable
them.
- Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>