Update soy to 2016-08-09 and icu4j to 57.1

Change-Id: I3835e8fde475e0453827f1604c8e9da6d5caf3c4

lib/soy/BUCK

diff --git a/lib/soy/BUCK b/lib/soy/BUCK
index dbd5aac..c92c810 100644
--- a/lib/soy/BUCK
+++ b/lib/soy/BUCK
@@ -1,7 +1,7 @@
 maven_jar(
   name = 'soy',
-  id = 'com.google.template:soy:2015-04-10',
-  sha1 = 'f2a260c0eafbc5756ccec546efd2ffd5b0a583cb',
+  id = 'com.google.template:soy:2016-08-09',
+  sha1 = '43d33651e95480d515fe26c10a662faafe3ad1e4',
   deps = [
     ':icu4j',
     '//lib:jsr305',
@@ -10,6 +10,6 @@
 
 maven_jar(
   name = 'icu4j',
-  id = 'com.ibm.icu:icu4j:51.1',
-  sha1 = '8ce396c4aed83c0c3de9158dc72c834fd283d5a4',
+  id = 'com.ibm.icu:icu4j:57.1',
+  sha1 = '198ea005f41219f038f4291f0b0e9f3259730e92',
 )