[clang] [AArch64] Simplify Clang's description of architecture extensions (PR #79311)

[via cfe-commits]

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@@ -860,7 +841,7 @@ bool AArch64TargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
     }
     if (Feature == "+dit")
       HasDIT = true;
-    if (Feature == "+cccp")
+    if (Feature == "+ccpp")
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ostannard wrote:

Again, does this need a test?

https://github.com/llvm/llvm-project/pull/79311