libopensc: assertion fails on calling fclose() on a NULL filehandle

From @geoffbeier:
(https://github.com/OpenSC/OpenSC/pull/171#issuecomment-20407132)

So it sounds like the right fix is to:

 * check the return value of sc_ctx_log_to_file() and have sc_do_log_va()
   return if it's anything other than SC_SUCCESS.
 * Inside sc_ctx_log_to_file() make sure to set ctx->debug_file to NULL
   whenever it does call fclose() on it.
 * Inside sc_do_log_va() where it currently calls fclose() check
   if(ctx->debug_file && ctx->debug_file != stdout &&ctx->debug_file != stderr)
make: change make order of SM components

to respect dependencies