[wasm] Use generic wrapper only for not imported functions

Bug: v8:10701
Change-Id: I6e6d0c67889f29647ea225163cf051d3432da338
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2335058Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Eva Herencsárová <evih@google.com>
Cr-Commit-Position: refs/heads/master@{#69214}

src/wasm/function-compiler.cc

@@ -275,7 +275,8 @@ JSToWasmWrapperCompilationUnit::JSToWasmWrapperCompilationUnit(
       sig_(sig),
 #if V8_TARGET_ARCH_X64
       use_generic_wrapper_(FLAG_wasm_generic_wrapper &&
-                           sig->parameters().empty() && sig->returns().empty()),
+                           sig->parameters().empty() &&
+                           sig->returns().empty() && !is_import),
 #else
       use_generic_wrapper_(false),
 #endif