fix(llvm): Phase 131-10 - Smart console.log routing（Segfault修正）

## 問題
- Integer値をi8*ポインタに変換 → Segfault（Exit 139）

## 解決策
- String literal → nyash.console.log(i8*)
- Integer/Handle → nyash.console.log_handle(i64)

## 結果
- Case B (loop_min_while): LLVM outputs `0,1,2` ✅
- VM/LLVM完全パリティ達成

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

crates/nyash_kernel/src/plugin/console.rs

@@ -25,12 +25,11 @@ pub extern "C" fn print(ptr: *const i8) -> i64 {
 #[export_name = "nyash.console.log_handle"]
 pub extern "C" fn nyash_console_log_handle(handle: i64) -> i64 {
     use nyash_rust::runtime::host_handles as handles;
-    eprintln!("DEBUG: handle={}", handle);
     if let Some(obj) = handles::get(handle as u64) {
         let s = obj.to_string_box().value;
         println!("{}", s);
     } else {
-        eprintln!("DEBUG: handle {} not found in registry", handle);
+        // Fallback: handle is an unboxed integer (Phase 131-10)
         println!("{}", handle);
     }
     0