Add missing commons-io dependency in BUILD file

Adding //lib:commons-io to DEPS in java/com/google/gitiles/BUILD ensures
that archive generation (used by ArchiveServlet) has the required
CountingOutputStream class available at runtime.

This fixes the NoClassDefFoundError occurring when using tgz links.

Change-Id: Id7551f10385e01f6f9db6a73d1f5f877fd55c281

java/com/google/gitiles/BUILD

diff --git a/java/com/google/gitiles/BUILD b/java/com/google/gitiles/BUILD
index 58934c0..84e8166 100644
--- a/java/com/google/gitiles/BUILD
+++ b/java/com/google/gitiles/BUILD
@@ -3,25 +3,26 @@
 load("//tools:stamper.bzl", "stamp")
 
 DEPS = [
+    "//java/com/google/gitiles/blame/cache",
     "//lib:autolink",
+    "//lib:cm-autolink",
+    "//lib:commonmark",
+    "//lib:commons-io",
     "//lib:commons-lang3",
     "//lib:commons-text",
     "//lib:errorprone-annotations",
+    "//lib/flogger",
+    "//lib:gfm-strikethrough",
+    "//lib:gfm-tables",
     "//lib:gson",
     "//lib:guava",
     "//lib:html-types",
-    "//lib:jsr305",
-    "//lib:commonmark",
-    "//lib:cm-autolink",
-    "//lib:gfm-tables",
-    "//lib:gfm-strikethrough",
-    "//lib:prettify",
     "//lib:jgit",
     "//lib:jgit-servlet",
+    "//lib:jsr305",
+    "//lib:prettify",
     "//lib:slf4j-api",
-    "//lib/flogger",
     "//lib/soy",
-    "//java/com/google/gitiles/blame/cache",
 ]
 
 DEPS_ALL = DEPS + [