[clang] [Clang] Fixed a crash when parsing #embed parameters with unmatched closing brackets (PR #152877)

[Aaron Ballman via cfe-commits]

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@@ -94,6 +94,9 @@ char buffer[] = {
 #embed "embed_parsing_errors.c" prefix() // OK: tokens within parens are optional
 #embed "embed_parsing_errors.c" prefix)
 // expected-error at -1 {{expected '('}}
+#embed "embed_parsing_errors.c" prefix()) // expected-error {{expected identifier}}
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AaronBallman wrote:

We should also make sure to handle unbalanced open braces as well: `prefix(()` and `suffix({)` etc.

https://github.com/llvm/llvm-project/pull/152877