Bump third_party/perfetto/repo from `b9aca8f` to `aff4b36` #5580

Job	Run time
Build on Linux (gcc_debug)	2m 32s
Build on Darwin (clang, simulated)	9m 5s
Build on Linux (fake, gcc_release, clang, simulated)	2m 13s
Build on Linux (coverage)	13m 51s
Build on Linux (python_lib)	1m 57s
Build on Linux (python lighting-app)	6m 40s
	36m 18s

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