$NetBSD$

Use the native compiler for building tools.

--- Makefile.orig	2023-04-03 20:38:50.000000000 +0000
+++ Makefile
@@ -824,7 +824,7 @@ UBOOTINCLUDE    := \
 	-I$(srctree)/arch/$(ARCH)/include \
 	-include $(srctree)/include/linux/kconfig.h
 
-NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
+# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 
 # FIX ME
 cpp_flags := $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) $(UBOOTINCLUDE) \