fix the test for environment variables

BUG=none
TEST=emerge-$BOARD minigbm
CQ-DEPEND=CL:220465

Change-Id: I1f594e5504e85e4f60d2143d21425899e2bd00e6
Signed-off-by: Dominik Behr <dbehr@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/220480
Reviewed-by: St├ęphane Marchesin <marcheu@chromium.org>
1 file changed