Add bazel into the required package list.

Change-Id: If7302fe8ae693ca1ebf7df93899f03b576ae8d57

install-prereqs.sh

diff --git a/install-prereqs.sh b/install-prereqs.sh
index 99986d4..60dbb6e 100755
--- a/install-prereqs.sh
+++ b/install-prereqs.sh
@@ -19,6 +19,7 @@
 
 APT_PACKAGES=(
     asciidoctor
+    bazel
     bison
     build-essential
     ccache