gyp: add __lt__ to MSVSSolutionEntry

PR-URL: #1904
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Christian Clauss <[email protected]>

Author: joaocgreis

gyp/pylib/gyp/MSVSNew.py

@@ -59,6 +59,9 @@ def __cmp__(self, other):
     # Sort by name then guid (so things are in order on vs2008).
     return cmp((self.name, self.get_guid()), (other.name, other.get_guid()))
 
+  def __lt__(self, other):
+    return self.__cmp__(other) < 0
+
 
 class MSVSFolder(MSVSSolutionEntry):
   """Folder in a Visual Studio project or solution."""