CMake

Bump third_party/libsbp from `84f224f` to `1bfe255` #683

Job	Run time
build_using_compiler_in_environment (clang, clang++)	1m 16s
coverage	53s
build_using_compiler_in_environment (gcc, g++)	1m 13s
install	1m 28s
linters (cppcheck)	1m 28s
test (clang-sanitize-address)	1m 42s
linters (clang-tidy)	1m 33s
test (clang-sanitize-undefined)	1m 37s
	11m 10s

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