Bump third_party/pigweed/repo from `1f12d06` to `f2d25b9` #885

Job	Run time
Build on Darwin (clang, python_lib, simulated)	3m 3s
Build on Linux (fake, gcc_release, clang, simulated)	1h 44m 11s
Build on Linux (coverage)	16m 24s
Build on Linux (gcc_debug)	1h 14m 31s
Build on Linux (python_lib)	2m 51s
Build on Linux (python lighting-app)	1m 54s
	3h 22m 54s

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