"accel" mode: Adjustments for sb2-check-pkg-mappings
"accel" mode: Adjustments for sb2-check-pkg-mappings

- enables smaller tools rootstraps (does not anymore require that
  certain packages are installed to both target- and tools rootstraps)
- fixes operation of qt4-dev (of maemo/meego)

loganchien/scratchbox2,ldbox/ldbox,loganchien/scratchbox2,madscientist42/scratchbox2,BinChengfei/scratchbox2,ldbox/ldbox,OlegGirko/ldbox,ldbox/ldbox,ldbox/ldbox,madscientist42/scratchbox2,madscientist42/scratchbox2,lbt/scratchbox2,BinChengfei/scratchbox2,loganchien/scratchbox2,lbt/scratchbox2,lbt/scratchbox2,ldbox/ldbox,loganchien/scratchbox2,OlegGirko/ldbox,BinChengfei/scratchbox2,lbt/scratchbox2,OlegGirko/ldbox,OlegGirko/ldbox,loganchien/scratchbox2,madscientist42/scratchbox2,ldbox/ldbox,madscientist42/scratchbox2,BinChengfei/scratchbox2,h113331pp/scratchbox2,loganchien/scratchbox2,h113331pp/scratchbox2,OlegGirko/ldbox,madscientist42/scratchbox2,h113331pp/scratchbox2,OlegGirko/ldbox,h113331pp/scratchbox2,h113331pp/scratchbox2,BinChengfei/scratchbox2,h113331pp/scratchbox2,lbt/scratchbox2,BinChengfei/scratchbox2