meta-phosphor: Add iperf3 to obmc-phosphor-debugtools

Useful for verifying network performance and investigating throughput
issues.

Change-Id: I26503f4a0631a106e2e4931d931f496b79728f98
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/meta-phosphor/recipes-phosphor/packagegroups/packagegroup-obmc-phosphor-debugtools.bb b/meta-phosphor/recipes-phosphor/packagegroups/packagegroup-obmc-phosphor-debugtools.bb
index 3118882..546404f 100644
--- a/meta-phosphor/recipes-phosphor/packagegroups/packagegroup-obmc-phosphor-debugtools.bb
+++ b/meta-phosphor/recipes-phosphor/packagegroups/packagegroup-obmc-phosphor-debugtools.bb
@@ -13,6 +13,7 @@
     tcpdump \
     screen \
     valgrind \
+    iperf3 \
     "
 
 # Some older arm architectures don't support valgrind, so explicitly remove