[llvm] [dyndbg][AsmPrinter] Add tail padding attributes (PR #194852)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Missing LangRef. Should also add to checkUnsignedBaseTenFuncAttr and use getFnAttributeAsParsedInteger.

The functionality itself sounds reasonable to me, but I'll defer to the MC folks on that.

https://github.com/llvm/llvm-project/pull/194852