devel/basu: unbreak build with LLD 13 (devel/llvm13 or -CURRENT)

ld: error: undefined symbol: __start_BUS_ERROR_MAP

referenced by bus-error.c

libsystemd_static.a.p/sd-bus_bus-error.c.o:(bus_error_name_to_errno) in archive src/libsystemd/libsystemd_static.a

ld: error: undefined symbol: __stop_BUS_ERROR_MAP

referenced by bus-error.c

libsystemd_static.a.p/sd-bus_bus-error.c.o:(bus_error_name_to_errno) in archive src/libsystemd/libsystemd_static.a

referenced by bus-error.c

libsystemd_static.a.p/sd-bus_bus-error.c.o:(bus_error_name_to_errno) in archive src/libsystemd/libsystemd_static.a

cc: error: linker command failed with exit code 1 (use -v to see invocation)

PR: 258812
Obtained from: https://github.com/systemd/systemd/commit/945317a4b69d