The change enables egl trace on error by setting property debug.egl.trace error,
based on definition of any string in DEBUG variable.
Tested with marshmallow-x86 and applicable also to lollipop-x86.
0*inteldrmfb|0*radeondrmfb|0*nouveaufb|0*svgadrmfb)
set_property ro.hardware.gralloc drm
set_drm_mode
0*inteldrmfb|0*radeondrmfb|0*nouveaufb|0*svgadrmfb)
set_property ro.hardware.gralloc drm
set_drm_mode
+ [ -n "$DEBUG" ] && set_property debug.egl.trace error