[libunwind] Add Unwind-wasm.c to CMakeLists.txt

Even though we don't use `CMakeLists.txt`, `Unwind-wasm.c` needs to be
included in the file to be a part of libunwind. Reflecting changes of
llvm/llvm-project#67770.

Author: aheejin

system/lib/libunwind/src/CMakeLists.txt

@@ -21,6 +21,7 @@ set(LIBUNWIND_C_SOURCES
     UnwindLevel1.c
     UnwindLevel1-gcc-ext.c
     Unwind-sjlj.c
+    Unwind-wasm.c
     )
 set_source_files_properties(${LIBUNWIND_C_SOURCES}
                             PROPERTIES

system/lib/libunwind/src/Unwind-wasm.c

@@ -10,13 +10,13 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifdef __USING_WASM_EXCEPTIONS__
+
 #include "config.h"
 #include "unwind.h"
 #include <stdbool.h>
 #include <threads.h>
 
-#ifdef __USING_WASM_EXCEPTIONS__
-
 _Unwind_Reason_Code __gxx_personality_wasm0(int version, _Unwind_Action actions,
                                             uint64_t exceptionClass,
                                             _Unwind_Exception *unwind_exception,