OBS: lib/debian: generate valid strongswan version

Ensure debian versions start with a number. For strongswan versions that
look like "osmo-epdg-0.1.1", adjust them to be like "0.1.1-osmo-epdg".

Fix for:
  dpkg-buildpackage: error: version number does not start with digit

Related: OS#6488
Change-Id: If535af23bca3a31f71daeade4d8b52403f7f7e17
---
M scripts/obs/lib/debian.py
1 file changed, 20 insertions(+), 0 deletions(-)

diff --git a/scripts/obs/lib/debian.py b/scripts/obs/lib/debian.py
index efe4ff3..1e48046 100644
--- a/scripts/obs/lib/debian.py
+++ b/scripts/obs/lib/debian.py
@@ -112,6 +112,10 @@
         # from wireshark. Don't abort here if that is the case.
         pass
 
+    # Debian versions must start with a digit
+    if version.startswith("osmo-epdg-"):
+        version = f"{version.replace('osmo-epdg-', '', 1)}-osmo-epdg"
+
     if version_changelog == version:
         return
 

