pflua: fix typo bug in native codegen (xor/or emission)
pflua: fix typo bug in native codegen (xor/or emission)

Igalia/snabb,Igalia/snabb,Igalia/snabb,Igalia/snabb,eugeneia/snabb,SnabbCo/snabbswitch,snabbco/snabb,SnabbCo/snabbswitch,SnabbCo/snabbswitch,snabbco/snabb,snabbco/snabb,Igalia/snabb,snabbco/snabb,SnabbCo/snabbswitch,Igalia/snabb,eugeneia/snabb,eugeneia/snabb,Igalia/snabb,snabbco/snabb,snabbco/snabb,eugeneia/snabb,snabbco/snabb,snabbco/snabb,eugeneia/snabb,Igalia/snabb,eugeneia/snabb,eugeneia/snabb,eugeneia/snabb