Silence warning for core/tests/stubs.c prlog missing prototype
Silence warning for core/tests/stubs.c prlog missing prototype

We get the real prototype in real code from skiboot.h

Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

legoater/skiboot,jk-ozlabs/skiboot,shenki/skiboot,qemu/skiboot,legoater/skiboot,cyrilbur-ibm/skiboot,shenki/skiboot,shenki/skiboot,ddstreet/skiboot,stewart-ibm/skiboot,mikey/skiboot,open-power/skiboot,ddstreet/skiboot,mikey/skiboot,apopple/skiboot,qemu/skiboot,qemu/skiboot,apopple/skiboot,open-power/skiboot,csmart/skiboot,shenki/skiboot,open-power/skiboot,shenki/skiboot,jk-ozlabs/skiboot,jk-ozlabs/skiboot,open-power/skiboot,neelegup/skiboot,cyrilbur-ibm/skiboot,stewart-ibm/skiboot,csmart/skiboot,legoater/skiboot,stewart-ibm/skiboot,ddstreet/skiboot,mikey/skiboot,apopple/skiboot,legoater/skiboot,cyrilbur-ibm/skiboot,neelegup/skiboot,neelegup/skiboot,qemu/skiboot,open-power/skiboot,csmart/skiboot,legoater/skiboot,qemu/skiboot