Fix broken wasm linker flags for LLVM16 (#7652)

* Fix broken wasm linker flags for LLVM16

* Update WasmExecutor.cpp

Author: steven-johnson

src/WasmExecutor.cpp

@@ -339,7 +339,10 @@ std::vector<char> compile_to_wasm(const Module &module, const std::string &fn_na
 
     std::string lld_arg_strs[] = {
         "HalideJITLinker",
-        "-flavor", "wasm",
+#if LLVM_VERSION >= 170
+        "-flavor",
+        "wasm",
+#endif
         // For debugging purposes:
         // "--verbose",
         // "-error-limit=0",
@@ -350,7 +353,8 @@ std::vector<char> compile_to_wasm(const Module &module, const std::string &fn_na
         obj_file.pathname(),
         "--entry=" + fn_name,
         "-o",
-        wasm_output.pathname()};
+        wasm_output.pathname()
+    };
 
     constexpr int c = sizeof(lld_arg_strs) / sizeof(lld_arg_strs[0]);
     const char *lld_args[c];