Tests

Bump third_party/pigweed/repo from `8ffdd15` to `1fbd499` #2472

Job	Run time
Test Suites - Darwin (no-ble-no-shell-tsan-clang)	1h 52m 25s
Test Suites - Darwin (no-ble-no-shell-asan-clang)	1h 24m 11s
Test Suites - Linux (no-ble-no-shell-tsan-clang)	6m 16s
REPL Tests - Linux	8m 16s
REPL Tests - Darwin	-1s
	3h 31m 7s

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