- Build snap also on i386, armhf and arm64. Ignore if it fails.

Most likely armhf and arm64 does not build yet, I will add fixes later.

Thanks to xet7 !

Related #1503,
related wekan/wekan-snap#46

snapcraft.yaml

@@ -14,7 +14,20 @@ confinement: strict
 grade: stable
 
 architectures:
-  - amd64
+  - build-on: amd64
+    run-on: amd64
+
+  - build-on: i386
+    run-on: i386
+    build-error: ignore
+
+  - build-on: armhf
+    run-on: armhf
+    build-error: ignore
+
+  - build-on: arm64
+    run-on: arm64
+    build-error: ignore
 
 plugs:
   mongodb-plug: