Move Texas_VSON-HR-8_1.5x2mm_P0.5mm from Package_DFN_QFN to Package_SON

See !1063 (merged)

This is a VSON package and so belongs with the other SONs in the Package_SON library.

• fpgen MR: (this)
• footprint MR: kicad-footprints!3544 (merged)
• symbol MR (three symbols are affected): kicad-symbols!4369 (merged)