Add 2.7.7 uuids.
diff --git a/Tools/msi/uuids.py b/Tools/msi/uuids.py
index 7c54e51..88c2d9e 100644
--- a/Tools/msi/uuids.py
+++ b/Tools/msi/uuids.py
@@ -63,4 +63,6 @@
     '2.7.5150':'{DBDD570E-0952-475f-9453-AB88F3DD5659}', # 2.7.5
     '2.7.6121':'{D1EBC07F-A7B1-4163-83DB-AE813CEF392F}', # 2.7.6rc1
     '2.7.6150':'{C3CC4DF5-39A5-4027-B136-2B3E1F5AB6E2}', # 2.7.6
+    '2.7.7121':'{5E0D187D-238B-4e96-9C75-C4CF141F5385}', # 2.7.7rc1
+    '2.7.7150':'{049CA433-77A0-4e48-AC76-180A282C4E10}', # 2.7.7
 }