Bump auto-value to 1.4-rc1

Among other this version fixed "Compile-time constant expression
overflows" bug, reported by Bazel 0.4.0. Other fixes and improvements
are here: [1].

This upgrade is needed to be able to support Bazel 0.4.0.

[1] https://github.com/google/auto/releases/tag/auto-value-1.4-rc1

Change-Id: I2e792bae1afa276efdf1580b6543fdc0cec6d45c
diff --git a/WORKSPACE b/WORKSPACE
index 3c8d851..a3db958 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -415,8 +415,8 @@
 
 maven_jar(
   name = 'auto_value',
-  artifact = 'com.google.auto.value:auto-value:1.3-rc1',
-  sha1 = 'b764e0fb7e11353fbff493b22fd6e83bf091a179',
+  artifact = 'com.google.auto.value:auto-value:1.4-rc1',
+  sha1 = '9347939002003a7a3c3af48271fc2c18734528a4',
 )
 
 maven_jar(
diff --git a/lib/auto/BUCK b/lib/auto/BUCK
index 6197e34..c186f87 100644
--- a/lib/auto/BUCK
+++ b/lib/auto/BUCK
@@ -2,8 +2,8 @@
 
 maven_jar(
   name = 'auto-value',
-  id = 'com.google.auto.value:auto-value:1.3-rc1',
-  sha1 = 'b764e0fb7e11353fbff493b22fd6e83bf091a179',
+  id = 'com.google.auto.value:auto-value:1.4-rc1',
+  sha1 = '9347939002003a7a3c3af48271fc2c18734528a4',
   license = 'Apache2.0',
   visibility = ['PUBLIC'],
 )