samplesshd: allow overriding KEYS_FOLDER by compiler option
samplesshd: allow overriding KEYS_FOLDER by compiler option

Signed-off-by: Andreas Schneider <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@cynapses.org>

nviennot/libssh,Distrotech/libssh,nviennot/libssh,jt1/honeypot-libssh,jt1/honeypot-libssh,bigcat26/libssh-mod,bigcat26/libssh-mod,taikoo/libssh,sebadoom/libssh,wangshawn/libssh,pouete/libssh,bigcat26/libssh-mod,taikoo/libssh,pouete/libssh,elastichosts/libssh,DouglasHeriot/libssh,robxu9/libssh,jahrome/libssh,substack/libssh,mwgoldsmith/libssh,Distrotech/libssh,mwgoldsmith/ssh,kedazo/libssh,kedazo/libssh,Distrotech/libssh,rofl0r/libssh,mwgoldsmith/libssh,kedazo/libssh,mwgoldsmith/ssh,bigcat26/libssh-mod,mwgoldsmith/libssh,DouglasHeriot/libssh,jt1/honeypot-libssh,elastichosts/libssh,nviennot/libssh,mwgoldsmith/ssh,elastichosts/libssh,Distrotech/libssh,miloj/libssh-v0.5,rofl0r/libssh,wangshawn/libssh,wangshawn/libssh,mwgoldsmith/ssh,robxu9/libssh,kedazo/libssh,robxu9/libssh,substack/libssh,jahrome/libssh,taikoo/libssh,miloj/libssh-v0.5,rofl0r/libssh,pouete/libssh,substack/libssh,taikoo/libssh,substack/libssh,wangshawn/libssh,jahrome/libssh,sebadoom/libssh,sebadoom/libssh,DouglasHeriot/libssh,pouete/libssh,sebadoom/libssh,miloj/libssh-v0.5,robxu9/libssh,DouglasHeriot/libssh,jahrome/libssh,jt1/honeypot-libssh,mwgoldsmith/libssh,rofl0r/libssh,nviennot/libssh,miloj/libssh-v0.5