Add Texas_R-PDSO-N5-DRL-5

While updating footprints for the 74xGxx library, I noticed the existing Texas_R-PDSO-N5 footprint didn't use the layout recommended by the datasheet.

The name isn't fully qualified because both the DRL (SOT-5x3) and the DRT (SOT-9x3) packages use the R-PDSO-N5 name (although currently TI only makes a 3-pin version of the DRT package).

Datasheet: https://www.ti.com/lit/ml/mpds158d/mpds158d.pdf

I've also put the new footprint in the Package_TO_SOT_SMD library instead of Package_SO, since I think it's a better fit. The package is technically SOF because the leads are flat instead of gull-winged, but I don't think there's enough SOF footprints to be worth making a library.

New Texas_R-PDSO-N5-DRL-5

Existing Texas_R-PDSO-N5