[clang] [clang] Fix --entry command line option (PR #69114)

[Fangrui Song via cfe-commits]

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@@ -5474,7 +5474,8 @@ def _dyld_prefix_EQ : Joined<["--"], "dyld-prefix=">;
 def _dyld_prefix : Separate<["--"], "dyld-prefix">, Alias<_dyld_prefix_EQ>;
 def _encoding_EQ : Joined<["--"], "encoding=">, Alias<fencoding_EQ>;
 def _encoding : Separate<["--"], "encoding">, Alias<fencoding_EQ>;
-def _entry : Flag<["--"], "entry">, Alias<e>;
+def : Joined<["--"], "entry=">, Flags<[LinkerInput]>, Group<Link_Group>, Alias<e>;
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MaskRay wrote:

Remove Flags and Group. They are ignored.

https://github.com/llvm/llvm-project/pull/69114