increase default stack size to 128KB
increase default stack size to 128KB

64KB was too small for many apps.  SWT in particular can use a lot of
stack space, especially on 64-bit systems.

badlogic/avian,joshuawarner32/avian,bigfatbrowncat/avian-pack.avian,getlantern/avian,getlantern/avian,MaartenR/avian,MaartenR/avian,lostdj/avian,lostdj/avian,dicej/avian,bgould/avian,ucdseniordesign/avian,joshuawarner32/avian,lostdj/avian,getlantern/avian,dicej/avian,minor-jason/avian,ucdseniordesign/avian,minor-jason/avian,ucdseniordesign/avian,dicej/avian,marcinolawski/avian,MaartenR/avian,lwahlmeier/avian,bigfatbrowncat/avian-pack.avian,marcinolawski/avian,bigfatbrowncat/avian-pack.avian,badlogic/avian,joshuawarner32/avian,marcinolawski/avian,badlogic/avian,getlantern/avian,lwahlmeier/avian,MaartenR/avian,marcinolawski/avian,minor-jason/avian,bgould/avian,lostdj/avian,bgould/avian,minor-jason/avian,joshuawarner32/avian,bigfatbrowncat/avian-pack.avian,badlogic/avian,lwahlmeier/avian,ucdseniordesign/avian,lwahlmeier/avian,dicej/avian,bgould/avian