Bump third_party/perfetto/repo from `b9aca8f` to `e682597` #1673

Job	Run time
Build on Linux (gcc_debug)	1m 47s
Build on Linux (fake, gcc_release, clang, simulated)	1m 48s
Build on Darwin (clang, simulated)	9m 46s
Build on Linux (python_lib)	1m 43s
Build on Linux (python lighting-app)	4m 51s
Build on Linux (coverage)	9m 43s
	29m 38s

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