cmake: Fail if can't find OpenSSL aes and des headers
cmake: Fail if can't find OpenSSL aes and des headers

Signed-off-by: Andreas Schneider <5be00ddc76278cf6077f5047ca3384a88460c671@cryptomilk.org>

kedazo/libssh,nviennot/libssh,pouete/libssh,kedazo/libssh,nviennot/libssh,nviennot/libssh,nviennot/libssh,sebadoom/libssh,pouete/libssh,sebadoom/libssh,kedazo/libssh,sebadoom/libssh,pouete/libssh,kedazo/libssh,pouete/libssh,sebadoom/libssh