add support for RGBA and BGRA_Ext (for cpp) internalFormat within Texture class
add support for RGBA and BGRA_Ext (for cpp) internalFormat within Texture class

Gama11/openfl,openfl/openfl,openfl/openfl,NenadBojkovski/openfl,Gama11/openfl,openfl/openfl,Gama11/openfl,NenadBojkovski/openfl,Gama11/openfl