Try to fix adopt-info.

https://forum.snapcraft.io/t/dirty-snap-release/12975/8

Thanks to ogra at Snapcraft forum.

snapcraft.yaml

@@ -1,6 +1,6 @@
 name: wekan
 version: 0
-adopt-info: snapcraftctl set-version $(git describe --dirty --tags | cut -c 2-)
+adopt-info: mypart
 summary: The Open-Source kanban
 description: |
    Wekan is an open-source and collaborative kanban board application.
@@ -226,6 +226,11 @@ parts:
         prime:
             - -lib/node_modules/node-pre-gyp/node_modules/tar/lib/.unpack.js.swp
 
+    mypart:
+      override-build: |
+        snapcraftctl set-version "$(git describe --dirty --tags | cut -c 2-)"
+        snapcraftctl build
+
     helpers:
         source: snap-src
         plugin: dump