align tests about Khmer characters with latest unicode spec
align tests about Khmer characters with latest unicode spec

zostay/roast,zostay/roast,niner/roast,skids/roast,cygx/roast,niner/roast,skids/roast,dogbert17/roast,b2gills/roast,bitrauser/roast,bitrauser/roast,dankogai/roast,niner/roast,skids/roast,dankogai/roast,laben/roast,perl6/roast,laben/roast,dogbert17/roast,zostay/roast,dankogai/roast,laben/roast,b2gills/roast,cygx/roast,b2gills/roast,cygx/roast