[llvm] [clang-tools-extra] [clang] [LoongArch] Insert nops and emit align reloc when handle alignment directive (PR #72962)

[Nico Weber via cfe-commits]

nico wrote:

Looks like this breaks check-llvm: http://45.33.8.238/macm1/77360/step_11.txt , http://45.33.8.238/linux/128902/step_12.txt

Please take a look and revert for now if it takes a while to fix.

https://github.com/llvm/llvm-project/pull/72962