Upgrade rust/crates/proc-macro-error to 1.0.4

Test: make
Change-Id: I3b48c3103904bb9e3e0b0a3e9cb7d91685cf88bd
diff --git a/METADATA b/METADATA
index 07686e8..e10f8c2 100644
--- a/METADATA
+++ b/METADATA
@@ -7,13 +7,13 @@
   }
   url {
     type: ARCHIVE
-    value: "https://static.crates.io/crates/proc-macro-error/proc-macro-error-1.0.2.crate"
+    value: "https://static.crates.io/crates/proc-macro-error/proc-macro-error-1.0.4.crate"
   }
-  version: "1.0.2"
+  version: "1.0.4"
   license_type: NOTICE
   last_upgrade_date {
     year: 2020
-    month: 5
-    day: 6
+    month: 9
+    day: 29
   }
 }