tests: Fix torture_pki build warnings.
tests: Fix torture_pki build warnings.

mwgoldsmith/libssh,nviennot/libssh,jt1/honeypot-libssh,mwgoldsmith/libssh,nviennot/libssh,DouglasHeriot/libssh,DouglasHeriot/libssh,elastichosts/libssh,bigcat26/libssh-mod,nviennot/libssh,pouete/libssh,jt1/honeypot-libssh,mwgoldsmith/libssh,mwgoldsmith/ssh,robxu9/libssh,Distrotech/libssh,bigcat26/libssh-mod,kedazo/libssh,wangshawn/libssh,pouete/libssh,mwgoldsmith/ssh,pouete/libssh,nviennot/libssh,kedazo/libssh,robxu9/libssh,elastichosts/libssh,elastichosts/libssh,mwgoldsmith/ssh,Distrotech/libssh,jt1/honeypot-libssh,wangshawn/libssh,robxu9/libssh,mwgoldsmith/libssh,taikoo/libssh,Distrotech/libssh,pouete/libssh,sebadoom/libssh,Distrotech/libssh,jt1/honeypot-libssh,DouglasHeriot/libssh,sebadoom/libssh,kedazo/libssh,bigcat26/libssh-mod,mwgoldsmith/ssh,sebadoom/libssh,kedazo/libssh,taikoo/libssh,wangshawn/libssh,DouglasHeriot/libssh,taikoo/libssh,taikoo/libssh,sebadoom/libssh,wangshawn/libssh,robxu9/libssh,bigcat26/libssh-mod