Install prereqs during continuous build

- Add m prereqs to continuous build
- Also, update kernel-package to the 16.04 version, which is aware of
arm64.

Change-Id: I58fad946b447cbf659b2e305622cff13b78c7c97
diff --git a/kokoro/continuous.sh b/kokoro/continuous.sh
index 11bb954..8322748 100644
--- a/kokoro/continuous.sh
+++ b/kokoro/continuous.sh
@@ -16,6 +16,13 @@
 export DEBOOTSTRAP_TARBALL_REVISION=.
 export ROOTFS_REVISION=.
 
+m prereqs
+
+# kernel-package in 14.04 is pre-arm64 . Update to the 16.04 version.
+echo "deb http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse" | sudo tee -a /etc/apt/sources.list
+sudo apt-get update
+sudo apt-get install kernel-package/xenial
+
 m
 m sdcard