[clang] [APINotes] Support C++ tag conformances to Swift protocols (PR #102664)

[Saleem Abdulrasool via cfe-commits]

================
@@ -572,6 +572,13 @@ class TagTableInfo
                                         ReleaseOpLength - 1);
       Data += ReleaseOpLength - 1;
     }
+    unsigned ConformsToLength =
+        endian::readNext<uint16_t, llvm::endianness::little>(Data);
+    if (ConformsToLength > 0) {
----------------
compnerd wrote:

```suggestion
    if (unsigned ConformsToLength =
            endian::readNext<uint16_t, llvm::endianness::little>(Data)) {
```

https://github.com/llvm/llvm-project/pull/102664
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