Move GLES20 source into standard locations Move Khronos headers into their respective components, to be exported by each. Remove hostthreadadapter as nothing outside of the vghwapiwrapper, which now contains the code, needs it

Remove copies of code made accidentally to the wrong location.

Copy code from the holdingarea into the target locations. Some initial rework of CMakeLists.txt files, but not yet tested.

Modify bug235.pkgdef.xml in line with changes to package_definition.xml Add license details to host support components.