Update soy to 2017-02-01

New release depends on safe-html-types that is released under Apache 2
license: [1].

[1] https://github.com/google/safe-html-types
Change-Id: If46fcf6dd2e7ad7e2c6eac0906e5df0fa401b6cc

lib/BUILD

@@ -264,6 +264,7 @@ java_library(
         ":args4j",
         ":gson",
         ":guava",
+        ":html-types",
         ":icu4j",
         ":jsr305",
         ":protobuf",
@@ -278,6 +279,13 @@ java_library(
     ],
 )
 
+java_library(
+    name = "html-types",
+    data = ["//lib:LICENSE-Apache2.0"],
+    visibility = ["//visibility:public"],
+    exports = ["@html_types//jar"],
+)
+
 java_library(
     name = "icu4j",
     data = ["//lib:LICENSE-icu4j"],