update_payload: uprev to minor version 6

BUG=chromium:920699
TEST=unittest
TEST=check_update_payload --check # with a delta payload

Change-Id: I40bc1e535ed241b74c6d889757a8dcf046bac0de
diff --git a/scripts/update_payload/applier.py b/scripts/update_payload/applier.py
index c63e156..21d8e87 100644
--- a/scripts/update_payload/applier.py
+++ b/scripts/update_payload/applier.py
@@ -586,10 +586,7 @@
       if self.minor_version == common.INPLACE_MINOR_PAYLOAD_VERSION:
         # Copy the src partition to the dst one; make sure we don't truncate it.
         shutil.copyfile(old_part_file_name, new_part_file_name)
-      elif (self.minor_version == common.SOURCE_MINOR_PAYLOAD_VERSION or
-            self.minor_version == common.OPSRCHASH_MINOR_PAYLOAD_VERSION or
-            self.minor_version == common.BROTLI_BSDIFF_MINOR_PAYLOAD_VERSION or
-            self.minor_version == common.PUFFDIFF_MINOR_PAYLOAD_VERSION):
+      elif self.minor_version >= common.SOURCE_MINOR_PAYLOAD_VERSION:
         # In minor version >= 2, we don't want to copy the partitions, so
         # instead just make the new partition file.
         open(new_part_file_name, 'w').close()
@@ -682,4 +679,3 @@
       self._ApplyToPartition(
           operations, name, '%s_install_operations' % name, new_parts[name],
           new_part_info[name], old_parts.get(name, None), old_part_info[name])
-
diff --git a/scripts/update_payload/checker.py b/scripts/update_payload/checker.py
index 15f11ae..6d17fbe 100644
--- a/scripts/update_payload/checker.py
+++ b/scripts/update_payload/checker.py
@@ -71,6 +71,7 @@
     3: (_TYPE_DELTA,),
     4: (_TYPE_DELTA,),
     5: (_TYPE_DELTA,),
+    6: (_TYPE_DELTA,),
 }
 
 _OLD_DELTA_USABLE_PART_SIZE = 2 * 1024 * 1024 * 1024