add PrintEnv to print environments

Signed-off-by: xiehuc <xiehuc@gmail.com>
add ShrinkLevel:2 reverse

only process IgnoreFunc.txt to debug, a quick method to check whether
minicore would work

Signed-off-by: xiehuc <xiehuc@gmail.com>
hide extra output ; use EXTRA_OUTPUT to open it

Signed-off-by: xiehuc <xiehuc@gmail.com>