main: Added entry point for glTransformFeedbackBufferRange

main: Added entry point for glTransformFeedbackBufferRange

v2: review from Laura Ekstrand
- use the refactored code to lookup the objects
- improve some error messages
- factor out the gl method name computation
- better handle the spec differences between the DSA and non-DSA cases
- quote the spec a little more

v3: review from Laura Ekstrand
- use the new name of _mesa_lookup_bufferobj_err
- swap the comments around the offset and size checks

v4: review from Laura Ekstrand
- add more spec quotes
- properly fix the comments around the offset and size checks

v5: review from Laura Ekstrand
- add quotes on the spec citations
- revert some changes in the printf format

v6: review from Laura Ekstrand
- remove a redondant "gl" in a method name

Signed-off-by: Martin Peres <martin.peres@linux.intel.com>
Reviewed-by: Laura Ekstrand <laura@jlekstrand.net>