[Linux] Fix bootscrap failure after python update

Author: yufengwangca

scripts/setup/bootstrap.sh

@@ -141,6 +141,7 @@ _bootstrap_or_activate() {
     $_CHIP_ROOT/scripts/setup/gen_pigweed_cipd_json.py \
         -i $_PIGWEED_CIPD_JSON                         \
         -o $_GENERATED_PIGWEED_CIPD_JSON               \
+        -e linux:$_PYTHON_CIPD_JSON                    \
         -e darwin:$_PYTHON_CIPD_JSON                   \
         -e windows:$_PYTHON_CIPD_JSON