ia32/mprotect: Non-deterministic PF on mprotect test

[agkaminski]

phoenix-rtos-tests/mem/mprotect-fault: ...

(psh)% dmesg -D
(psh)% /bin/test-mprotect-fault
Unity test run 1 of 1

Exception: 14 #PF
eax=00000000 cs=00003286 eip=0000001b eflgs=003e7e82
ebx=00005000 ss=0000baba esp=00000023 ebp=bfffff58
ecx=00000000 ds=00000000 esi=00000023 fs=00000000
edx=00000000 es=00000000 edi=08048360 gs=00000000
dr0=00000000 dr1=00000000 dr2=00000000 dr3=00000000
dr6=ffff0ff0 dr7=00000400 cr2=0003287b

[damianloew]

We expect the following behavior: