DOCKER: missing libasan in U18 target image

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

docker/Dockerfile.ubuntu.18.04

@@ -101,6 +101,7 @@ COPY --from=oai-amf-builder /usr/lib/x86_64-linux-gnu/libroken.so.18 .
 COPY --from=oai-amf-builder /usr/lib/x86_64-linux-gnu/libwind.so.0 .
 COPY --from=oai-amf-builder /usr/lib/x86_64-linux-gnu/libhx509.so.5 .
 COPY --from=oai-amf-builder /usr/lib/x86_64-linux-gnu/libsqlite3.so.0 .
+COPY --from=oai-amf-builder /usr/lib/x86_64-linux-gnu/libasan.so.4 .
 
 WORKDIR /usr/local/lib
 COPY --from=oai-amf-builder /usr/local/lib/libpistache.so  .
@@ -118,4 +119,4 @@ EXPOSE 80/tcp 9090/tcp 38412/sctp
 
 ENTRYPOINT ["/bin/bash","/openair-amf/bin/entrypoint.sh"]
 
-CMD ["/openair-amf/bin/oai_amf", "-c", "/openair-amf/etc/amf.conf", "-o"]
\ No newline at end of file
+CMD ["/openair-amf/bin/oai_amf", "-c", "/openair-amf/etc/amf.conf", "-o"]