tests: Disable options parsing if argp isn't available.
tests: Disable options parsing if argp isn't available.

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