uImage: adapt test output to file-5.41

File-5.40->5.41 upgrade brought uImage printing change
which removed 0x prefixes in a few places:
  https://github.com/file/file/commit/905ca555b0e2bdcf9d2985bcc7c1c22e2229b088

This caused test faiure:
  E       AssertionError: assert '@@ -1 +1 @@\... 0XC63C4A06\n' == '@@ -1 +1 @@\... 0xC63C4A06\n'
  E         Skipping 127 identical leading characters in diff, use -v to show
  E         - Address: 0x00000000, Entry Point: 0x00000000, Header CRC: 0xF87AD200, Data CRC: 0x347161A5
  E         ?          --                       --                       ^                     ^
  E         + Address: 00000000, Entry Point: 00000000, Header CRC: 0XF87AD200, Data CRC: 0X347161A5
  E         ?                                                        ^                     ^

The change adds new variant of expected output.