Added two new transistor symbols

Created by: SchrodingersGat

Dual FET (N + P) in small no-lead packages

• QH8MA3 - http://rohmfs.rohm.com/en/products/databook/datasheet/discrete/transistor/mosfet/qh8ma3tcr-e.pdf
• Si5504 - https://www.vishay.com/docs/74483/si5504bdc.pdf

New footprints are here - https://github.com/KiCad/kicad-footprints/pull/832