[clang] [PowerPC] Support local-dynamic TLS relocation on AIX (PR #66316)

[Amy Kwan via cfe-commits]

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@@ -6,6 +6,6 @@
 #endif
 
 static __thread int y __attribute((tls_model("global-dynamic"))); // no-warning
-static __thread int y __attribute((tls_model("local-dynamic"))); // expected-error {{TLS model 'local-dynamic' is not yet supported on AIX}}
+static __thread int y __attribute((tls_model("local-dynamic"))); // expected-no-diagnostics
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amy-kwan wrote:

Thanks! I think this is expected as noted in https://clang.llvm.org/doxygen/VerifyDiagnosticConsumer_8h_source.html#l00178:
> /// VerifyDiagnosticConsumer expects at least one expected-* directive to
/// be found inside the source code.  If no diagnostics are expected the
/// following directive can be used to indicate this:
///
/// \code
///   // expected-no-diagnostics
/// \endcode

https://github.com/llvm/llvm-project/pull/66316