api: odp_hints.h add ODP_WEAK_SYMBOL
api: odp_hints.h add ODP_WEAK_SYMBOL

Several ODP APIs require that the application is able to replace them with
a more appropriate definition. By defining an ODP function as weak the linker
is able to replace the definition with the one supplied by the application.

Signed-off-by: Mike Holmes <ed44c09f4d7f698f5510adc894a872c73e08c8bd@linaro.org>
Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>

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