executor: linux: Android and gVisor are unable to mount tmpfs with sandbox=none

[ramosian-glider]

https://github.com/google/syzkaller/pull/4959 broke program execution on Android:

SYZFAIL: mount(tmpfs) failed
 (errno 28: No space left on device)
loop exited with status 67

and gVisor:

SYZFAIL: mount(proc) failed
 (errno 14: Bad address)
loop exited with status 67