CMake

Bump third_party/libsbp from `b9860dc` to `9415861` #704

Job	Run time
build_using_compiler_in_environment (clang, clang++)	1m 36s
coverage	1m 26s
build_using_compiler_in_environment (gcc, g++)	1m 55s
install	1m 32s
linters (cppcheck)	2m 30s
linters (clang-tidy)	2m 59s
test (clang-sanitize-address)	2m 3s
test (clang-sanitize-undefined)	1m 49s
	15m 50s

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