update_engine: bump minor version to 5

We recently disable puffin in minor version 4 and enabled it in minor version
5. This patch bumps the minor version to 5.

BUG=chromium:810184
TEST=brillo_update_payload {generate|verify}

Change-Id: I06b92f792fbc05c0acec062f8f3ff5d7305bd0a0
Reviewed-on: https://chromium-review.googlesource.com/917306
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
diff --git a/payload_consumer/delta_performer.cc b/payload_consumer/delta_performer.cc
index 83e74fa..2a63153 100644
--- a/payload_consumer/delta_performer.cc
+++ b/payload_consumer/delta_performer.cc
@@ -72,7 +72,7 @@
 const uint64_t DeltaPerformer::kDeltaMetadataSignatureSizeSize = 4;
 const uint64_t DeltaPerformer::kMaxPayloadHeaderSize = 24;
 const uint64_t DeltaPerformer::kSupportedMajorPayloadVersion = 2;
-const uint32_t DeltaPerformer::kSupportedMinorPayloadVersion = 4;
+const uint32_t DeltaPerformer::kSupportedMinorPayloadVersion = 5;
 
 const unsigned DeltaPerformer::kProgressLogMaxChunks = 10;
 const unsigned DeltaPerformer::kProgressLogTimeoutSeconds = 30;