This will function okay, particularly if you use good resistors, and don't need more than some % DC accuracy.
The 78L05 is not a very good regulator and its a worse reference so it's almost surely going to limit the overall DC system accuracy if not dealt with. You could measure the voltage with one channel of your ADC and deal with it digitally, but power supply noise will again limit accuracy and will likely have some unfortunate statistical correlations that limit what can be done in the digital domain.
The 78L05 has an accuracy of +/-200mV and a typical temperature coefficient of -0.65mV/K. Since the relatively high-end op-amp you're looking at has an offset of 300uV maximum (40uV typical) and a drift of typically 1uV/K the reference errors will dominate (by 250:1 for offset and drift typically), even with the 2/5 divider. The resistor tolerances will add some errors too.
In fact, I suggest you use the ADC reference 4.096V output as the primary reference source rather than your power rail and use precision resistors.
The particular op-amp you've chosen is not quite suitable for buffering the ADC reference output (only guaranteed to work to 4V input, not 4.096V). It also has an enormous input bias current (5.2uA maximum- enough to light up an LED) so if DC accuracy is important to you, resistances have to be kept quite low (the internal ADC reference can only supply +/-300uA and you had best keep loading to less than that). The main advantage of this op-amp is low noise, but there are many better choices if you don't need such low noise (it's only a 16-bit ADC, so without doing any calculations I suspect that is not a requirement even over the maximum 125kHz BW for that ADC).
Edit: Also see EM's answer regarding the error in the level of the offset voltage. The above comments still apply except the divider should be 1/5 from 5V or ~1/4 from 4.096V.