[llvm] [llvm-objcopy] Add --gap-fill and --pad-to options (PR #65815)

[James Henderson via llvm-commits]

================
@@ -44,10 +37,10 @@
 # DEFAULT-NEXT: 000080 00 00 89 ab cd ef
 # DEFAULT-NEXT: 000086
 
-# Test gap fill with all allocatable output sections
+## Test gap fill with all allocatable output sections
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jh7370 wrote:

```suggestion
## Test gap fill with all allocatable output sections.
```
Nit.

https://github.com/llvm/llvm-project/pull/65815