logs-show: print multiline messages

[    0.019862] fedora kernel: CPU0: Thermal monitoring enabled (TM1)
[    0.019900] fedora kernel: Last level iTLB entries: 4KB 512, 2MB 0, 4MB 0
                              Last level dTLB entries: 4KB 512, 2MB 32, 4MB 32
                              tlb_flushall_shift: 5
[    0.020118] fedora kernel: Freeing SMP alternatives: 24k freed