add dtk version

setup.py

@@ -185,6 +185,11 @@ if command_exists('git') and 'DS_BUILD_STRING' not in os.environ:
         git_hash = result.decode('utf-8').strip()
         result = subprocess.check_output(git_branch_cmd, shell=True)
         git_branch = result.decode('utf-8').strip()
+        #add dtk version
+        if os.getenv('DS_BUILD_VERSION'):
+            version_dtk = os.getenv('DS_BUILD_VERSION', "")
+            git_hash += "." + version_dtk
+
     except subprocess.CalledProcessError:
         git_hash = "unknown"
         git_branch = "unknown"