cpu: removing tabs from asm files (#1439)

```find . -name "*.[sS]" -exec grep -l $'\t' {} \;``` and ```ack --asm -l "\t"```
revealed three more files with tabs.
Merge pull request #1532 from cgundogan/remove_tabs_asm

cpu: removing tabs from asm files (#1439)
core/queue: queue -> priority_queue

Rename queue to priority queue, because that's what it is.
core/priority_queue: add dynamic initializer
priority_queue_node_init