SST26VFxxxB added.

SST26VFxxxB added. Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/SST26VF064B-SST26VF064BA-2.5V-3.0V-64-Mbit-Serial-Quad-IO-Flash-Memory-Data-Sheet-DS20005119J.pdf

Footprint PRs: https://github.com/KiCad/kicad-footprints/pull/2018 https://github.com/KiCad/kicad-footprints/pull/2017 Existing Footprints: SOIC-16 and SOIJ-8

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All contributions to the kicad library must follow the KiCad library convention

Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:

• Provide a URL to a datasheet for the symbol(s) you are contributing
• An example screenshot image is very helpful
• Ensure that the associated footprints match the official footprint library
  • A new fitting footprint must be submitted if the library does not yet contain one.
• If there are matching footprint PRs, provide link(s) as appropriate
• Check the output of the Travis automated check scripts - fix any errors as required
• Give a reason behind any intentional library convention rule violation.