[PATCH] bodhi-pungi: Add AtomicHost variant

[Dusty Mabe]

Otherwise we get messages like this when trying to create
Atomic Host artifacts:

```
[WARNING ] [OSTREE_INSTALLER] Patterns in config do not match any variant: ^AtomicHost$
```
---
 roles/bodhi2/backend/templates/variants.rpm.xml.j2 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/roles/bodhi2/backend/templates/variants.rpm.xml.j2
b/roles/bodhi2/backend/templates/variants.rpm.xml.j2
index 4b6625086..d36d31437 100644
--- a/roles/bodhi2/backend/templates/variants.rpm.xml.j2
+++ b/roles/bodhi2/backend/templates/variants.rpm.xml.j2
@@ -22,4 +22,11 @@
 	    [% endif %]
         </arches>
     </variant>
+    <variant id="AtomicHost" name="AtomicHost"
type="variant" is_empty="true">
+        <arches>
+            <arch>aarch64</arch>
+            <arch>x86_64</arch>
+            <arch>ppc64le</arch>
+        </arches>
+    </variant>
 </variants>
-- 
2.14.3