Add mtk-board-audio package to packages.

Change-Id: I1e3160a7961efb4a2d0381bba1f17c08c6413d9d
diff --git a/multistrap.conf b/multistrap.conf
index a954413..aac4f36 100644
--- a/multistrap.conf
+++ b/multistrap.conf
@@ -9,4 +9,4 @@
 [main]
 packages=MAIN_PACKAGES
 source=https://packages.cloud.google.com/apt
-suite=mendel-animal
+suite=mendel-beaker
diff --git a/packages.mk b/packages.mk
index 522dced..c65f94e 100644
--- a/packages.mk
+++ b/packages.mk
@@ -19,3 +19,4 @@
 $(eval $(call make-pbuilder-bsp-package-target,boot-keys,bootloader/mtk-tools/keys,u-boot-mkimage))
 $(eval $(call make-pbuilder-bsp-package-target,excelsior-wlan,packages/excelsior-wlan))
 $(eval $(call make-pbuilder-bsp-package-target,excelsior-nvram,packages/excelsior-nvram))
+$(eval $(call make-pbuilder-bsp-package-target,mtk-board-audio,packages/mtk-board-audio))
diff --git a/rootfs.mk b/rootfs.mk
index fc0ef82..2950f78 100644
--- a/rootfs.mk
+++ b/rootfs.mk
@@ -17,6 +17,7 @@
     excelsior-wlan \
     linux-image-4.4.22-mtk \
     lk-bootloader \
+    mtk-board-audio \
     python3-edgetpu \
     trustzone