[llvm] Add adjustVMA option (PR #72870)

[James Henderson via llvm-commits]

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@@ -483,6 +483,12 @@ them.
 
  Mark all defined global symbols as weak in the output.
 
+.. option:: --adjust-vma <value>
+  Add ``<value>`` to VMA and LMA address
+
+.. option:: --adjust-section-vma <name>{+|-|=}<value>
+  Adjust section ``<name>`` VMA and LMA address by ``<value>``
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jh7370 wrote:

```suggestion
  Adjust section ``<name>`` VMA and LMA address by ``<value>``.
```
I think this could do with some elaboration regarding what `=` means in this context (presumably it means setting it to the value specified, but that isn't "adjust it by something").

https://github.com/llvm/llvm-project/pull/72870