[clang] [clang][openmp] Fixing Issue-162243 (PR #165562)

[Alexey Bataev via cfe-commits]

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@@ -8,6 +8,7 @@
 #pragma omp groupprivate( // expected-error {{expected identifier}} expected-error {{expected ')'}} expected-note {{to match this '('}}
 #pragma omp groupprivate() // expected-error {{expected identifier}}
 #pragma omp groupprivate(1) // expected-error {{expected unqualified-id}}
+#pragma omp groupprivate(a) // expected-error {{use of undeclared identifier 'a'}}
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alexey-bataev wrote:

How does it test the bug?

https://github.com/llvm/llvm-project/pull/165562