This patch adds a mention that the following papers are in progress:

* P2770R0: #66033
* P2441R2 and P2711R1: #65536

When a packet containing extended immediates and new-value compare-jump
instructions with fixups was followed by a .p2align directive, we
would incorrectly add nops to the packet. After reshuffling, the fixup
offsets would become invalid, causing corrupted encodings.

Fixes round-trip assembly for patterns like:

    {
      r18 = #llvm#65536
      if (!cmp.gtu(r1,r18.new)) jump:t .L1
    }
    .p2align 4

…179168)

When a packet containing extended immediates and new-value compare-jump
instructions with fixups was followed by a .p2align directive, we would
incorrectly add nops to the packet. After reshuffling, the fixup offsets
would become invalid, causing corrupted encodings.

Fixes round-trip assembly for patterns like:

    {
      r18 = ##65536
      if (!cmp.gtu(r1,r18.new)) jump:t .L1
    }
    .p2align 4

…lvm#179168)

When a packet containing extended immediates and new-value compare-jump
instructions with fixups was followed by a .p2align directive, we would
incorrectly add nops to the packet. After reshuffling, the fixup offsets
would become invalid, causing corrupted encodings.

Fixes round-trip assembly for patterns like:

    {
      r18 = #llvm#65536
      if (!cmp.gtu(r1,r18.new)) jump:t .L1
    }
    .p2align 4

(cherry picked from commit 87d73f7)