[llvm] [llvm-objdump] Print out xcoff file header for xcoff object file with option private-headers (PR #96350)

[James Henderson via llvm-commits]

================
@@ -18,21 +22,29 @@ Sections:
     Flags:           [ STYP_DATA ]
     SectionData:     "0000000000000FC0"
 
-# CHECK32:      ---File Header:
-# CHECK32-NEXT: Magic:              0x1df
-# CHECK32-NEXT: NumberOfSections:   2
-# CHECK32-NEXT: TimeStamp:          None (0)
-# CHECK32-NEXT: SymbolTableOffset:  0x0
-# CHECK32-NEXT: SymbolTableEntries: 0
-# CHECK32-NEXT: OptionalHeaderSize: 0x0
-# CHECK32-NEXT: Flags:              0x0
+# CHECK32:---File Header:
+# CHECK32-NEXT:Magic:              0x1df
+# CHECK32-NEXT:NumberOfSections:   2
+# CHECK32-NEXT:TimeStamp:          None (0)
+# CHECK32-NEXT:SymbolTableOffset:  0x0
+# CHECK32-NEXT:SymbolTableEntries: 0
+# CHECK32-NEXT:OptionalHeaderSize: 0x0
+# CHECK32-NEXT:Flags:              0x0
+
+# CHECK64:---File Header:
+# CHECK64-NEXT:Magic:              0x1f7
+# CHECK64-NEXT:NumberOfSections:   2
+# CHECK64-NEXT:TimeStamp:          None (0)
+# CHECK64-NEXT:SymbolTableOffset:  0x0
+# CHECK64-NEXT:SymbolTableEntries: 0
+# CHECK64-NEXT:OptionalHeaderSize: 0x0
+# CHECK64-NEXT:Flags:              0x0
 
-# CHECK64:      ---File Header:
-# CHECK64-NEXT: Magic:              0x1f7
-# CHECK64-NEXT: NumberOfSections:   2
-# CHECK64-NEXT: TimeStamp:          None (0)
-# CHECK64-NEXT: SymbolTableOffset:  0x0
-# CHECK64-NEXT: SymbolTableEntries: 0
-# CHECK64-NEXT: OptionalHeaderSize: 0x0
-# CHECK64-NEXT: Flags:              0x0
+--- !XCOFF
+FileHeader:
+  MagicNumber:       0x1DF
+  CreationTime:      1234
+  EntriesInSymbolTable: -1
----------------
jh7370 wrote:

Line the values up
```suggestion
  MagicNumber:          0x1DF
  CreationTime:         1234
  EntriesInSymbolTable: -1
```

https://github.com/llvm/llvm-project/pull/96350