Update download_toolchain.sh

download_toolchain.sh

@@ -148,7 +148,7 @@ function SHELL_FUNCTION_KERNAL_GIT_CLONE(){
 	git_branch=${git_branch%% *}
 	
 	echo "git_branch     : ${git_branch}"
-	echo "git_cmd        : git clone ${git_repository_https} --depth 2 -b ${git_branch}"
+	echo "git_cmd        : git clone ${git_repository_https} --depth 1 -b ${git_branch}"
 
 	git clone ${git_repository_https} --quiet --depth 1 -b ${git_branch}
 	mv ${git_project} toolchain-${git_branch}