[llvm] [Hexagon] Add missing build attributes (PR #166992)

[via llvm-commits]

https://github.com/quic-areg created https://github.com/llvm/llvm-project/pull/166992

Attributes for v77-81 were recorded but ignored.

>From 7aef9ae670c6cb3ff939d3912ab5ae55169e9fd6 Mon Sep 17 00:00:00 2001
From: quic-areg <aregmi at qti.qualcomm.com>
Date: Fri, 7 Nov 2025 10:45:18 -0800
Subject: [PATCH] [Hexagon] Add missing build attributes

Attributes for v77-81 were recorded but ignored.
---
 llvm/lib/Object/ELFObjectFile.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/llvm/lib/Object/ELFObjectFile.cpp b/llvm/lib/Object/ELFObjectFile.cpp
index f9fda23469ee5..178b557c38541 100644
--- a/llvm/lib/Object/ELFObjectFile.cpp
+++ b/llvm/lib/Object/ELFObjectFile.cpp
@@ -311,6 +311,12 @@ static std::optional<std::string> hexagonAttrToFeatureString(unsigned Attr) {
     return "v73";
   case 75:
     return "v75";
+  case 77:
+    return "v77";
+  case 79:
+    return "v79";
+  case 81:
+    return "v81";
   default:
     return {};
   }