sb: Fix configparser import on Python2 in version.py.

Updates #2619.

source-builder/sb-set-builder

@@ -24,8 +24,6 @@ import sys, os
 base = os.path.dirname(sys.argv[0])
 sys.path.insert(0, base + '/sb')
 
-import setbuilder
-
 try:
     import setbuilder
     setbuilder.run()

source-builder/sb/version.py

@@ -50,7 +50,10 @@ def _load_released_version_config():
     top = _top()
     for ver in [top, '..']:
         if path.exists(path.join(ver, 'VERSION')):
-            import configparser
+            try:
+                import configparser
+            except ImportError:
+                import ConfigParser as configparser
             v = configparser.SafeConfigParser()
             v.read(path.join(ver, 'VERSION'))
             return v