Bump third_party/jsoncpp/repo from `69098a1` to `ba00447` #114922

Job	Run time
Build on Darwin (clang, simulated)	50m 47s
Build on Linux (fake, gcc_release, clang, simulated)	49m 59s
Build on Linux (coverage)	18m 25s
Build on Linux (gcc_debug)	49m 16s
Build on Linux (python_lib)	19m 38s
Build on Linux (python lighting-app)	4m 58s
	3h 13m 3s

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