Fix: examples Makefile on FreeBSD

Support BSD-style make.

Fixes #565

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Update gitignore

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
example makefile: add missing cd ..

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>