No copyright check for .elf; fix --clean-py
No copyright check for .elf; fix --clean-py

Change-Id: I7bb42a4bfc5d8df7a9846af02aef585ca7bc44bd

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed