gn2bp: Remove file from //out for jni_registration_generator.py

Test: ./update_results.sh
Change-Id: If613607bd20d6049f31ba5c95a206037cec9a55a
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index 768b524..06cbae0 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -812,6 +812,7 @@
     # TODO: find a better way to do this.
     target.deps.clear()
 
+    target.inputs = [file for file in target.inputs if not file.startswith('//out/')]
     for i, val in enumerate(target.args):
       if val in ['--depfile', '--srcjar-path', '--header-path']:
         target.args[i + 1] = re.sub('^gen', '$(genDir)', target.args[i + 1])