Disable CFG_TOYBOX_DEBUG for now.

We turned on CFG_TOYBOX_DEBUG so ls would be asan-clean, but that turns out
to have broken mount for non-root users. So let's turn CFG_TOYBOX_DEBUG off
for now, but let's also say that ls should always be asan-clean on Android.

Bug: http://b/26647560
Change-Id: I5392aedd168c1e765e3319e3c76e996040b7e8ab
4 files changed