reduce excessive doxygen execution output
reduce excessive doxygen execution output

such as:

Searching for files to process...
Running dot for graph 71/71
Patching output file 1/36

note: warnings are retained.

Signed-off-by: Kim Phillips <4dbb162515b917285c0a29b08c706fd5ea64dadc@linaro.org>

dkrot/odp,mike-holmes-linaro/odp,robbieking64/odp-crypto,rsalveti/odp,ravineet-singh/odp,kalray/odp-mppa,dkrot/odp,kalray/odp-mppa,nmorey/odp,rsalveti/odp,rsalveti/odp,kalray/odp-mppa,ravineet-singh/odp,rsalveti/odp,nmorey/odp,mike-holmes-linaro/odp,erachmi/odp,mike-holmes-linaro/odp,robbieking64/odp-crypto,kalray/odp-mppa,dkrot/odp,erachmi/odp,mike-holmes-linaro/odp,kalray/odp-mppa,dkrot/odp,erachmi/odp,ravineet-singh/odp,robbieking64/odp-crypto,nmorey/odp,kalray/odp-mppa,kalray/odp-mppa,robbieking64/odp-crypto,nmorey/odp,ravineet-singh/odp,erachmi/odp,rsalveti/odp