Add test for printenv
Add test for printenv

Change-Id: I06bf6e31afa09c2ad251e02a56aa1ba15392489e
Signed-off-by: mathgamain <c848246abd5d1fb5c3cd8395e13f4e6f630f73a9@openaliasbox.org>

u-root/u-root,u-root/u-root,rminnich/u-root,rminnich/u-root,GanShun/u-root,hugelgupf/u-root,hugelgupf/u-root,GanShun/u-root,rminnich/u-root,GanShun/u-root,u-root/u-root,hugelgupf/u-root,rminnich/u-root,hugelgupf/u-root