These two files should only be built when OpenSSL is not enabled. See
the configure script of the original sources and Makefile from upstream.
(RNG_EXTRA_OBJS)
Fixes a -Wimplicit-function-declaration warning.
The latter is a well known automake variable, used
to set (per-Makefile) automake options and supported
since the beginning of time (= automake 1.4).
The former is a made-up variable that doesn't really
do anything.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>