LSan options are omitted from ASAN_OPTIONS=help=1

[ramosian-glider]

When building the code with ASan, LSan gets linked into the resulting binary, but LSan options aren't printed:

$ cat t.cc
int main() {
  return 0;
}

$ clang++ t.cc -o t -fsanitize=leak
# No output, ASAN_OPTIONS are ignored.
$ ASAN_OPTIONS=help=1 ./t
# LSan options are printed as expected.
$ LSAN_OPTIONS=help=1 ./t 2>&1 | grep use_globals
	use_globals

$ clang++ t.cc -o t -fsanitize=address
# Only ASan options are printed, despite LSan is enabled.
$ ASAN_OPTIONS=help=1 ./t 2>&1 | grep use_globals
# Only ASan options are printed, despite LSan is enabled.
$ LSAN_OPTIONS=help=1 ./t 2>&1 | grep use_globals

$ clang++ t.cc -o t -fsanitize=address,leak
# Only ASan options are printed, despite LSan is enabled.
$ ASAN_OPTIONS=help=1 ./t 2>&1 | grep use_globals
# Only ASan options are printed, despite LSan is enabled.
$ LSAN_OPTIONS=help=1 ./t 2>&1 | grep use_globals