Fix package WAR missing failureaccess JAR

webserver ClassNotFoundException due to WAR missing failureaccess JAR
The pkg_war() rule is missing this runtime dependency. Without it we get
exceptions like:
java.lang.ClassNotFoundException:
com.google.common.util.concurrent.internal.InternalFutureFailureAccess

Bug: Issue 450323474
Change-Id: Icfb1f0e7625b5e64a01ca1552bc579b202ffb83a

BUILD

diff --git a/BUILD b/BUILD
index 3d84a08..9782c01 100644
--- a/BUILD
+++ b/BUILD
@@ -7,6 +7,7 @@
         "//lib/jetty:server",
         "//lib/jetty:servlet",
         "//lib:slf4j-simple",
+        "//lib:guava-failureaccess",
         "//java/com/google/gitiles:servlet",
     ],
     web_xml = "//resources:web_xml",