edgetpu: Ensure edgetpu and edgetpuvision are built natively

edgtpu and edgetpuvision have a slight quirk in their control files: they depend
on dh-python and python3. Unfortunately, in pbuilder's crossbuild environment,
these packages actually create an unresolvable conflict across architectures and
the package will fail to build.

We can resolve this by using a native build for these packages.

Change-Id: If1abbc00a10d1e2d56a244c00a410d5c8c2fbb27
diff --git a/packages.mk b/packages.mk
index 1c75969..4cceb89 100644
--- a/packages.mk
+++ b/packages.mk
@@ -121,8 +121,8 @@
 $(eval $(call make-pbuilder-package-target,android-core,android-core))
 $(eval $(call make-pbuilder-package-target,mendel-minimal,packages/mendel-minimal))
 $(eval $(call make-pbuilder-package-target,base-files,packages/base-files))
-$(eval $(call make-pbuilder-package-target,edgetpu,packages/edgetpu,,,binary))
-$(eval $(call make-pbuilder-package-target,edgetpuvision,packages/edgetpuvision))
+$(eval $(call make-pbuilder-package-target,edgetpu,packages/edgetpu,,,binary,,native))
+$(eval $(call make-pbuilder-package-target,edgetpuvision,packages/edgetpuvision,,,,,native))
 $(eval $(call make-pbuilder-package-target,edgetpudemo,packages/edgetpudemo))
 $(eval $(call make-pbuilder-package-target,mdt-services,packages/mdt-services))
 $(eval $(call make-pbuilder-package-target,mendel-distro-info-data,packages/mendel-distro-info-data))