onos-local-log now works with buck run

Change-Id: I086ed7e4825ba19d920815f5946bf778bb90f3c6
diff --git a/tools/dev/bin/onos-local-log b/tools/dev/bin/onos-local-log
index a17d3b9..d7f0c7e 100755
--- a/tools/dev/bin/onos-local-log
+++ b/tools/dev/bin/onos-local-log
@@ -2,7 +2,9 @@
 # ----------------------------------------------------------------------------
 # Continuously watches the Apache Karaf log; survives 'karaf clean'
 # ----------------------------------------------------------------------------
-KARAF_LOG=${KARAF_LOG:-~/apache-karaf-$KARAF_VERSION/data/log/karaf.log}
+. $ONOS_ROOT/tools/build/envDefaults
+
+KARAF_LOG=/tmp/onos-$ONOS_POM_VERSION/apache-karaf-$KARAF_VERSION/data/log/karaf.log
 
 while true; do
     [ ! -f $KARAF_LOG ] && sleep 2 && continue