odk: remove output directory before invoking doxygen
odk: remove output directory before invoking doxygen

Change-Id: I04b8dbecbe62f8d72ca75f6508046294c3409a17

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core