SystemUI: Updated Polish translation

Patch Set 2: Added comments above and below CyanogenMod additions
Patch Set 3: Fixed some minor typos

Change-Id: Ie2685b00264afe2503f4c57a3b80e39d83162149
PT-BR: Update translation

Change-Id: I76c8a6c2a31a5bb9c5320d22e036caf47c672787
Merge "SystemUI: Updated Polish translation" into cm-10.1
Merge "PT-BR: Update translation" into cm-10.1