Do not compile ChronoSync support by default

ChronoSync dependency is now made optional
and is kept for testing purposes only.

Also change sig-type to ecdsa-sha256 in nlsr.conf
as ndn-cxx now has strict checking for it.

refs: #5147

Change-Id: I95c9fb844681ebf2c4e7bbb03cc7796a0795de83
diff --git a/.jenkins.d/10-build.sh b/.jenkins.d/10-build.sh
index 2a60f0d..b09f968 100755
--- a/.jenkins.d/10-build.sh
+++ b/.jenkins.d/10-build.sh
@@ -28,7 +28,7 @@
 fi
 
 # Build in debug mode with tests
-./waf --color=yes configure --debug --with-tests $ASAN $COVERAGE
+./waf --color=yes configure --with-chronosync --debug --with-tests $ASAN $COVERAGE
 ./waf --color=yes build -j$WAF_JOBS
 
 # (tests will be run against the debug version)