Exclude lib.target folder from apk test tarballs

- We don't need this folder for our builds

BUG=132707
TEST=


Review URL: https://chromiumcodereview.appspot.com/10645008

git-svn-id: http://src.chromium.org/svn/trunk/src/build@143547 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/buildbot_functions.sh

@@ -255,6 +255,7 @@ function bb_zip_build {
   echo "@@@BUILD_STEP Zip build@@@"
   python ../../../../scripts/slave/zip_build.py \
     --src-dir "$SRC_ROOT" \
+    --exclude-files "lib.target" \
     --factory-properties "$FACTORY_PROPERTIES" \
     --build-properties "$BUILD_PROPERTIES"
 }