[libunwind] Add Unwind-wasm.c to CMakeLists.txt (#67770)

This was missing when the file was added in
058222b231.

Also reordered some headers to make LLVM CI and clang-format happy.

libunwind/src/CMakeLists.txt

@@ -16,6 +16,7 @@ set(LIBUNWIND_C_SOURCES
     UnwindLevel1.c
     UnwindLevel1-gcc-ext.c
     Unwind-sjlj.c
+    Unwind-wasm.c
     )
 set_source_files_properties(${LIBUNWIND_C_SOURCES}
                             PROPERTIES

libunwind/src/Unwind-wasm.c

@@ -10,13 +10,15 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "config.h"
-#include "unwind.h"
 #include <stdbool.h>
-#include <threads.h>
+
+#include "config.h"
 
 #ifdef __USING_WASM_EXCEPTIONS__
 
+#include "unwind.h"
+#include <threads.h>
+
 _Unwind_Reason_Code __gxx_personality_wasm0(int version, _Unwind_Action actions,
                                             uint64_t exceptionClass,
                                             _Unwind_Exception *unwind_exception,
@@ -118,4 +120,4 @@ _Unwind_GetRegionStart(struct _Unwind_Context *context) {
   return 0;
 }
 
-#endif
+#endif // defined(__USING_WASM_EXCEPTIONS__)