enbale wasm-c-api unit test on X86_32

Author: Septa2112

tests/unit/wasm-c-api/CMakeLists.txt

@@ -13,7 +13,9 @@ set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
 
 # WAMR features switch
-set(WAMR_BUILD_TARGET "X86_64")
+if (NOT DEFINED WAMR_BUILD_TARGET)
+  set(WAMR_BUILD_TARGET "X86_64")
+endif()
 set(WAMR_BUILD_INTERP 1)
 set(WAMR_BUILD_AOT 0)
 set(WAMR_BUILD_JIT 0)