Fixing NACL_DEBUG=1 for nacl-spawn.
Fixing NACL_DEBUG=1 for nacl-spawn.

BUG=None
TEST=manual
R=gdeepti@chromium.org

Review URL: https://codereview.chromium.org/1130003002

yeyus/naclports,yeyus/naclports,yeyus/naclports,yeyus/naclports,yeyus/naclports,yeyus/naclports