tools: Avoid creating symbolic links for tools/version.h

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>

Makefile

@@ -1830,11 +1830,14 @@ checkarmreloc: u-boot
 		false; \
 	fi
 
-envtools: scripts_basic $(version_h) $(timestamp_h)
+tools/version.h: include/version.h
+	$(call if_changed,copy)
+
+envtools: scripts_basic $(version_h) $(timestamp_h) tools/version.h
 	$(Q)$(MAKE) $(build)=tools/env
 
 tools-only: export TOOLS_ONLY=y
-tools-only: scripts_basic $(version_h) $(timestamp_h)
+tools-only: scripts_basic $(version_h) $(timestamp_h) tools/version.h
 	$(Q)$(MAKE) $(build)=tools
 
 tools-all: export HOST_TOOLS_ALL=y
@@ -1862,7 +1865,7 @@ CLEAN_DIRS  += $(MODVERDIR) \
 	       $(foreach d, spl tpl, $(patsubst %,$d/%, \
 			$(filter-out include, $(shell ls -1 $d 2>/dev/null))))
 
-CLEAN_FILES += include/bmp_logo.h include/bmp_logo_data.h \
+CLEAN_FILES += include/bmp_logo.h include/bmp_logo_data.h tools/version.h \
 	       boot* u-boot* MLO* SPL System.map fit-dtb.blob*
 
 # Directories & files removed with 'make mrproper'

tools/.gitignore

@@ -31,4 +31,5 @@
 /spl_size_limit
 /sunxi-spl-image-builder
 /ubsha1
+/version.h
 /xway-swap-bytes

tools/version.h

-../include/version.h
\ No newline at end of file