update t440p script

coreboot-t440p/steps/build_cbfstool.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+# Step: Build cbfstool
+
+step_build_cbfstool() {
+  section "Build cbfstool"
+
+  info "Building cbfstool (Coreboot Filesystem tool)..."
+  cd "$COREBOOT_DIR" || return 1
+  run_cmd "make -C util/cbfstool" || return 1
+
+  if [ ! -f "$COREBOOT_DIR/util/cbfstool/cbfstool" ]; then
+    error "cbfstool binary not found after build."
+    return 1
+  fi
+
+  success "cbfstool built."
+}