feat(python): file permissions (CWE-276) #1378

Job	Run time
build (javascript/express)	2m 7s
build (javascript/hapi)	14s
build (javascript/lang)	3m 21s
build (javascript/node)	14s
build (javascript/react)	25s
build (javascript/third_parties)	1m 57s
build (ruby/lang)	4m 15s
build (ruby/rails)	1m 37s
build (ruby/third_parties)	3m 25s
build (java/lang)	3m 1s
build (java/spring)	19s
build (java/android)	13s
build (java/third_parties)	34s
build (php/lang)	5m 3s
build (php/symfony)	55s
build (php/third_parties)	1m 6s
build (python/django)	29s
build (python/lang)	1m 9s
build (go/lang)	58s
build (go/gosec)	2m 10s
build (go/gorilla)	17s
build (go/third_parties)	41s
	34m 30s

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