Install python3-setuptools

setuptools is no longer part of the base python install

Bypass-Presubmit-Reason: tested manually
Change-Id: I32349755d5bb0d3bf7ce3d708c84d79cf81d2326

install-prereqs.sh

diff --git a/install-prereqs.sh b/install-prereqs.sh
index 89c60ac..c96353a 100755
--- a/install-prereqs.sh
+++ b/install-prereqs.sh
@@ -77,10 +77,11 @@
     protobuf-compiler
     pv
     python-is-python3
-    python3-protobuf
     python3
     python3-dev
     python3-pip
+    python3-protobuf
+    python3-setuptools
     python3-venv
     rsync
     rustc