Upgrade auto-value to 1.4.1

According to the release notes [1] the only difference from 1.4 is
removal of a workaround for an Eclipse bug.

[1] https://github.com/google/auto/releases/tag/auto-value-1.4.1

Change-Id: I0de46865ce52cf4fb5f3dde218209fbcace5d18d
diff --git a/WORKSPACE b/WORKSPACE
index 0ccbe3d..78e8fdf 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -409,8 +409,8 @@
 
 maven_jar(
     name = "auto_value",
-    artifact = "com.google.auto.value:auto-value:1.4",
-    sha1 = "6d1448fcd13074bd3658ef915022410b7c48343b",
+    artifact = "com.google.auto.value:auto-value:1.4.1",
+    sha1 = "8172ebbd7970188aff304c8a420b9f17168f6f48",
 )
 
 maven_jar(