tests: Add a valgrind suppression for OPENSSL_cleanse().
tests: Add a valgrind suppression for OPENSSL_cleanse().

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