Add generate_test_uws to chrome_cleaner target so it's built by default

Bug: 1004848
Change-Id: If501b9dc47dade3fc03396935d8f775ff479d0c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1939934Reviewed-by: proberge <proberge@chromium.org>
Commit-Queue: Joe Mason <joenotcharles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720012}

chrome/chrome_cleaner/BUILD.gn

@@ -134,6 +134,7 @@ group("chrome_cleaner") {
     ":chrome_cleaner_unittests",
     "//chrome/chrome_cleaner/executables:chrome_cleanup_tool",
     "//chrome/chrome_cleaner/executables:software_reporter_tool",
+    "//chrome/chrome_cleaner/tools:generate_test_uws",
   ]
 
   if (is_internal_chrome_cleaner_build) {