update_engine: update error log am: 8879b04ea3

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2991907

Change-Id: Id1bc4c13744b432c8f115c8bab6d4f6a633e4cca
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/payload_consumer/delta_performer.cc b/payload_consumer/delta_performer.cc
index fe581b6..519ec71 100644
--- a/payload_consumer/delta_performer.cc
+++ b/payload_consumer/delta_performer.cc
@@ -503,7 +503,9 @@
     if (!CanPerformInstallOperation(op))
       return true;
     if (!ProcessOperation(&op, error)) {
-      LOG(ERROR) << "unable to process operation: " << *error;
+      LOG(ERROR) << "unable to process operation: "
+                 << InstallOperationTypeName(op.type())
+                 << " Error: " << utils::ErrorCodeToString(*error);
       return false;
     }