Add conditional acceleration for doxygen
Add conditional acceleration for doxygen

Only accelerate doxygen if it can be found from the target root

Signed-off-by: Juha Kallioinen <43c4d3ea39adf273f2c732766de5ac244e802225@jollamobile.com>

OlegGirko/ldbox,ldbox/ldbox,ldbox/ldbox,OlegGirko/ldbox,ldbox/ldbox,ldbox/ldbox,OlegGirko/ldbox,OlegGirko/ldbox,ldbox/ldbox,OlegGirko/ldbox,ldbox/ldbox,OlegGirko/ldbox