gn2bp: Add required file to tool_files

Test: ./update_results.sh
Change-Id: I85f17cfd0c9c636de4d0937c2a38e091bd0afe8c
diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
index 495e460..47606a8 100644
--- a/tools/gn2bp/Android.bp.swp
+++ b/tools/gn2bp/Android.bp.swp
@@ -2620,6 +2620,7 @@
     ],
     tool_files: [
         "build/util/LASTCHANGE",
+        "build/util/android_chrome_version.py",
         "build/util/version.py",
         "chrome/VERSION",
         "components/cronet/version.h.in",
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index c36307b..6df7457 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -904,6 +904,8 @@
     # depends on this target includes .cc file this script generates.
     module.genrule_headers.add(module.name)
   elif target.script == "//build/util/version.py":
+    # android_chrome_version.py is not specified in anywhere but version.py imports this file
+    module.tool_files.add('build/util/android_chrome_version.py')
     for i, val in enumerate(target.args):
       if val.startswith('../../'):
         filename = re.sub('^\.\./\.\./', '', val)