test: initialize syslog_fd in fuzz-journald-kmsg too
    
    This is a follow-up to 8857fb9beb9dcb that prevents the fuzzer from crashing with
    ```
    ==220==ERROR: AddressSanitizer: ABRT on unknown address 0x0000000000dc (pc 0x7ff4953c8428 bp 0x7ffcf66ec290 sp 0x7ffcf66ec128 T0)
    SCARINESS: 10 (signal)
        #0 0x7ff4953c8427 in gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35427)
        #1 0x7ff4953ca029 in abort (/lib/x86_64-linux-gnu/libc.so.6+0x37029)
        #2 0x7ff49666503a in log_assert_failed_realm /work/build/../../src/systemd/src/basic/log.c:805:9
        #3 0x7ff496614ecf in safe_close /work/build/../../src/systemd/src/basic/fd-util.c:66:17
        #4 0x548806 in server_done /work/build/../../src/systemd/src/journal/journald-server.c:2064:9
        #5 0x5349fa in LLVMFuzzerTestOneInput /work/build/../../src/systemd/src/fuzz/fuzz-journald-kmsg.c:26:9
        #6 0x592755 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/libfuzzer/FuzzerLoop.cpp:571:15
        #7 0x590627 in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long, bool, fuzzer::InputInfo*, bool*) /src/libfuzzer/FuzzerLoop.cpp:480:3
        #8 0x594432 in fuzzer::Fuzzer::MutateAndTestOne() /src/libfuzzer/FuzzerLoop.cpp:708:19
        #9 0x5973c6 in fuzzer::Fuzzer::Loop(std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, fuzzer::fuzzer_allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > const&) /src/libfuzzer/FuzzerLoop.cpp:839:5
        #10 0x574541 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/libfuzzer/FuzzerDriver.cpp:764:6
        #11 0x5675fc in main /src/libfuzzer/FuzzerMain.cpp:20:10
        #12 0x7ff4953b382f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
        #13 0x420f58 in _start (/out/fuzz-journald-kmsg+0x420f58)
    ```
    
    (cherry picked from commit cc55ac0171a2493768c021faa356513642797e7f)
    
    Resolves: #1764560
    
    patch_name: 0258-test-initialize-syslog_fd-in-fuzz-journald-kmsg-too.patch
    present_in_specfile: true
    location_in_specfile: 258
    squash_commits: true