[clang] [Clang][Cygwin] attempt to fix building shared libclang. (PR #138351)

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github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions h -- clang/include/clang-c/Platform.h
``````````

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/clang/include/clang-c/Platform.h b/clang/include/clang-c/Platform.h
index 8d341ddd6..1c28ccf81 100644
--- a/clang/include/clang-c/Platform.h
+++ b/clang/include/clang-c/Platform.h
@@ -23,13 +23,13 @@ LLVM_CLANG_C_EXTERN_C_BEGIN
   #define CINDEX_EXPORTS
 #endif
 #if defined(_WIN32) || defined(__CYGWIN__)
-  #ifdef CINDEX_EXPORTS
-    #ifdef _CINDEX_LIB_
-      #define CINDEX_LINKAGE __declspec(dllexport)
-    #else
-      #define CINDEX_LINKAGE __declspec(dllimport)
-    #endif
-  #endif
+#ifdef CINDEX_EXPORTS
+#ifdef _CINDEX_LIB_
+#define CINDEX_LINKAGE __declspec(dllexport)
+#else
+#define CINDEX_LINKAGE __declspec(dllimport)
+#endif
+#endif
 #elif defined(CINDEX_EXPORTS) && defined(__GNUC__)
   #define CINDEX_LINKAGE __attribute__((visibility("default")))
 #endif

``````````

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https://github.com/llvm/llvm-project/pull/138351