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-servlet/BUCK

diff --git a/gitiles-servlet/BUCK b/gitiles-servlet/BUCK
index 8ff8035..217075b 100644
--- a/gitiles-servlet/BUCK
+++ b/gitiles-servlet/BUCK
@@ -5,7 +5,6 @@
 RSRC = glob(['src/main/resources/**/*'])
 DEPS = [
   '//lib:guava',
-  '//lib:soy',
   '//lib:joda-time',
   '//lib:gson',
   '//lib:commons-lang',
@@ -13,6 +12,7 @@
   '//lib/jgit:jgit',
   '//lib/jgit:jgit-servlet',
   '//lib/slf4j:slf4j-api',
+  '//lib/soy:soy',
 ]
 
 DEPS_ALL = DEPS + [