toolbox: install tcpdump and traceroute by default in toolbox

BUG=b/260916290
TEST=presubmit
RELEASE_NOTE=Enable tcpdump and traceroute by default in toolbox.

Change-Id: I850501e8bc54abae3ec028498b255ecb67b4507b
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/40885
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
Reviewed-by: Arnav Kansal <rnv@google.com>
Tested-by: Varsha Teratipally <teratipally@google.com>
diff --git a/src/cmd/toolbox/Dockerfile b/src/cmd/toolbox/Dockerfile
index eec4a37..4ce7a6b 100644
--- a/src/cmd/toolbox/Dockerfile
+++ b/src/cmd/toolbox/Dockerfile
@@ -26,7 +26,7 @@
 # Various networking and other tools. net-tools installs arp, netstat, etc.
 RUN apt-get install -u -qq vim \
     net-tools netcat ipset conntrack inetutils-traceroute bridge-utils \
-    ebtables iputils-ping \
+    ebtables iputils-ping traceroute tcpdump \
     && apt-get clean
 
 # These packages are required or extracting source tarballs and building the kernel.