Update Soy to latest version

Released at upstream (https://github.com/google/closure-templates) but
not yet to Maven Central, so deployed a release to the Gerrit
repository.

Add new dependency on ICU4J and move to its own subpackage.

Change-Id: I7fd2df81c65334924485cebca7f1d3cdc97f64ec

gitiles-dev/BUCK

diff --git a/gitiles-dev/BUCK b/gitiles-dev/BUCK
index 0ab7c53..fe841a8 100644
--- a/gitiles-dev/BUCK
+++ b/gitiles-dev/BUCK
@@ -4,14 +4,14 @@
   deps = [
     '//gitiles-servlet:servlet',
     '//lib:guava',
+    '//lib:servlet-api_3_0',
     '//lib/jgit:jgit',
     '//lib/jgit:jgit-servlet',
     '//lib/jetty:server',
     '//lib/jetty:servlet',
     '//lib/slf4j:slf4j-api',
     '//lib/slf4j:slf4j-simple',
-    '//lib:servlet-api_3_0',
-    '//lib:soy',
+    '//lib/soy:soy',
   ],
   visibility = ['PUBLIC'],
 )