Bump third_party/perfetto/repo from `b9aca8f` to `7bf1bcb` #5583

Job	Run time
Build on Linux (fake, gcc_release, clang, simulated)	2m 32s
Build on Linux (gcc_debug)	2m 14s
Build on Linux (python_lib)	2m 31s
Build on Linux (python lighting-app)	6m 52s
Build on Darwin (clang, simulated)	7m 57s
Build on Linux (coverage)	15m 10s
	37m 16s

Provide feedback