vtd: Add git describe to profile_default

If no VERSION is explicitly set, use the git describe version tag.

Author: scpa1055

optional/vtd/tests/profile_default.py

@@ -25,6 +25,8 @@ def set_version(self):
             if version_file.exists():
                 self.version = self.project_version(version_path)
                 return
+        git = tools.Git(folder=self.recipe_folder)
+        self.version = git.run("describe --dirty=-dirty")[1:]
 
     def requirements(self):
         self.requires(f"cloe-engine/{self.version}@cloe/develop")