Bump third_party/pigweed/repo from `9e4bfb9` to `ba80fb5` #836

Job	Run time
REPL Tests - Linux	13m 18s
Test Suites - Darwin (no-ble-asan-clang)	1h 11m 36s
Test Suites - Darwin (no-ble-tsan-clang)	1h 22m 39s
Test Suites - Linux (no-ble-tsan-clang)	13m 35s
REPL Tests - Darwin	0s
	3h 1m 8s

Provide feedback