Fix pin numbering in 1.5mm pitch Pico-Lock connectors (504050 series)

Created by: justyn

The existing footprints have reversed pin ordering, so that pad 1 does not match that on the datasheet or indicated by the pin 1 indicator on the connector itself.

The footprints are created with kicad-footprint-generator with:

smd_single_row_plus_mounting_pad.py conn_molex.yaml

Footprints generated by this script must always have pin 1 on the left-most side, so in order to fix the numbering the connectors are rotated by 180 degrees.

These files are generated from updated value tracked in https://github.com/pointhi/kicad-footprint-generator/pull/628

Fixes #2465 (closed)

This update also fixes incorrect tags that specified "top entry" instead of "horizontal".