abrt-pstoreoops does not merge messages in proper order.

Issue

• abrt-pstoreoops does not merge messages in proper order.

  <4>[  108.968670]  ffffffff8139810f ffff880851e09200 ffff88007808bef0 ffffffff8122de0d
  <4>[  108.968711] Call Trace:
  <4>[  108.968728]  [<ffffffff81397c32>] __handle_sysrq+0xa2/0x170
  <4>[  108.968755]  [<ffffffff8139810f>] write_sysrq_trigger+0x2f/0x40
  <4>[  108.968784]  [<ffffffff8122de0d>] proc_reg_write+0x3d/0x80
  <4>[  108.968810]  [<ffffffff811c65dd>] vfs_write+0xbd/0x1e0
  <4>[  108.968835]  [<ffffffff811c7028>] SyS_write+0x58/0xb0
  <4>[  108.968862]  [<ffffffff81613da9>] system_call_fastpath+0x16/0x1b
  <4>[  108.968888] Code: eb 9b 45 01 f4 45 39 65 34 75 e5 4c 89 ef e8 e2 f7 ff ff eb db 0f 1f 44 00 00 55 c7 05 50 d7 59 00 01 00 00 00 48 89 e5 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 0f 1f 44 00 00 55 31 c0 c7 05 ce 
  <1>[  108.969031] RIP  [<ffffffff81397486>] sysrq_handle_crash+0x16/0x20
  <4>[  108.969060]  RSP <ffff88007808be80>
  <4>[  108.969076] CR2: 0000000000000000
  <4>[  108.972763] ---[ end trace 8e4c7f792e98c309 ]---
  <0>[  109.041214] Kernel panic - not syncing: Fatal exception
  <4>[  108.968322] RDX: 0000000000000000 RSI: ffff88085f98d488 RDI: 0000000000000063
  <4>[  108.968351] RBP: ffff88007808be80 R08: 0000000000000092 R09: 0000000000000791
  <4>[  108.968380] R10: 0000000000000790 R11: 0000000000000003 R12: 0000000000000063
  <4>[  108.968409] R13: 0000000000000246 R14: 0000000000000004 R15: 0000000000000000
  <4>[  108.968438] FS:  00007f577a625740(0000) GS:ffff88085f980000(0000) knlGS:0000000000000000
  <4>[  108.968471] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  <4>[  108.968495] CR2: 0000000000000000 CR3: 0000000077da5000 CR4: 00000000001407e0
  <4>[  108.968524] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  <4>[  108.968553] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  <4>[  108.968582] Stack:
  <4>[  108.968593]  ffff88007808beb8 ffffffff81397c32 0000000000000002 00007f577a631000
  <4>[  108.968630]  ffff88007808bf48 0000000000000002 0000000000000000 ffff88007808bed0