roll back submodule changes
remove unused shadertest
roll back target=android-10
Merge pull request #6668 from dabingnn/v3_fix_accident_changes

V3 fix accident changes
Merge pull request #6667 from super626/improved_glprogram

remove unused shadertest
add deprecated alias  cc.VERTEX_ATTRIB_TEX_COORDS
Merge pull request #6669 from dabingnn/v3_fix_accident_changes

add deprecated alias  cc.VERTEX_ATTRIB_TEX_COORDS