vrend: fix bgrx->rgb fallback data upload for GLES hosts
Follow up for !1349 (merged) to fix remaining issues.
/cc @gerddie
Fix the swizzle, reconfigure the unpack alignment/stride, use the correct GLenum GL_RGB
for data upload API calls, add TODO to implement also for the missed readback path.
Fixes: 4717292c ("vrend: deal with BGRX upload on GLES")
Signed-off-by: Ryan Neph ryanneph@google.com
Edited by Ryan Neph