Bump third_party/pigweed/repo from `ea93eb5` to `1f12d06` #269

Job	Run time
Build on Darwin (clang, python_lib, simulated)	1h 4m 55s
Build on Linux (fake, gcc_release, clang, simulated)	1h 28m 19s
Build on Linux (coverage)	13m 42s
Build on Linux (python_lib)	18m 54s
Build on Linux (gcc_debug)	49m 21s
Build on Linux (python lighting-app)	6m 20s
	4h 1m 31s

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