[wasm] Use a C wrapper function to calculate F64Pow.

src/wasm/wasm-external-refs.h

Index: src/wasm/wasm-external-refs.h
diff --git a/src/wasm/wasm-external-refs.h b/src/wasm/wasm-external-refs.h
index ac938d6d67d9147d9ae36a54fbf8009f843b984a..d9539ce71a8869f71cbc3e6a7ecaf89214529a89 100644
--- a/src/wasm/wasm-external-refs.h
+++ b/src/wasm/wasm-external-refs.h
@@ -58,6 +58,9 @@ uint32_t word64_ctz_wrapper(uint64_t* input);
 uint32_t word32_popcnt_wrapper(uint32_t* input);
 
 uint32_t word64_popcnt_wrapper(uint64_t* input);
+
+void float64_pow_wrapper(double* param0, double* param1);
+
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8