Modularized example paths are defined in module-specific .qdocconf
files. This change fixes \example command for a number of examples to
be relative to those paths. This way, the manifest files will have a
correct project path for each example.
Change-Id: I6d3dba34a1eb04a2bc294520102e232ccd0f0ba2
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>