Disable set -e for extract build step

build/android/buildbot_functions.sh

Index: build/android/buildbot_functions.sh
diff --git a/build/android/buildbot_functions.sh b/build/android/buildbot_functions.sh
index 42d63c2280005e3cc5930b64196ec0ae8b56215d..362c70fabbf003549fd0e72dc1bb301632261a79 100755
--- a/build/android/buildbot_functions.sh
+++ b/build/android/buildbot_functions.sh
@@ -266,10 +266,24 @@ function bb_extract_build {
     return 1
   fi
 
+  # When extract_build.py downloads an unversioned build it
+  # issues a warning by exiting with large numbered return code
+  # When it fails to download it build, it exits with return
+  # code 1.  We disable halt on error mode and return normally
+  # unless the python tool returns 1.
+  (
+  set +e
   python ../../../../scripts/slave/extract_build.py \
     --build-dir "$SRC_ROOT" \
     --build-output-dir "out" \
     --target Release \
     --factory-properties "$FACTORY_PROPERTIES" \
     --build-properties "$BUILD_PROPERTIES"
+  extract_exitcode=$?
+  if (( $extract_exitcode > 1 )); then
+    echo "@@@STEP_WARNINGS@@@"
+    return
+  fi
+  return $extract_exitcode
+  )
 }