Add includes parameter to fix warnings when generating a translation file.

When generating a translation file with e.g. "make de.ts" more than 150 warnings like the following appeared.
/home/daniel/Lmms/src/tracks/Pattern.cpp:642: Qualifying with unknown namespace/class ::PatternView
/home/daniel/Lmms/src/tracks/Pattern.cpp:701: Qualifying with unknown namespace/class ::PatternView
/home/daniel/Lmms/src/tracks/AutomationTrack.cpp:40: Qualifying with unknown namespace/class ::AutomationTrack
...