fbida: use separate builddir

Separate builddir from the sourcedir.

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Sujith H <sujith.h@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Armin Kuster <akuster808@gmail.com>