Merge ~esunar/charm-advanced-routing:fix-functional-tests into charm-advanced-routing:master

[Erhan Sunar]

Fix the build issue caused by https://github.com/juju-solutions/layer-basic/issues/215

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[Robert Gildein (rgildein)]

review: Approve

[Ramesh Sattaru (rameshcan)]

review: Approve

[🤖 prod-jenkaas-bootstack (prod-jenkaas-bootstack)]

PASSED: Continuous integration, rev:a325b4d74d85c5d6e9db3c642449163d827bbf54
https://jenkins.canonical.com/bootstack/job/lp-charm-advanced-routing-ci/3/
Executed test runs:
    SUCCESS: https://jenkins.canonical.com/bootstack/job/lp-charm-test-functest/726/
    None: https://jenkins.canonical.com/bootstack/job/lp-update-mp/229/

Click here to trigger a rebuild:
https://jenkins.canonical.com/bootstack/job/lp-charm-advanced-routing-ci/3//rebuild

review: Approve (continuous-integration)

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision 34644e9463da5fe00d76f9c2247bf452d527ac21

diff --git a/charmcraft.yaml b/charmcraft.yaml
index 8b247f5..7c65e9e 100644
--- a/charmcraft.yaml
+++ b/charmcraft.yaml
@@ -4,6 +4,7 @@ parts:
     source: src
     plugin: reactive
     build-snaps: [charm]
+    build-packages: [python3-dev]
 bases:
     - build-on:
         - name: ubuntu