added WSON-8-1EP_5x6mm_P1.27mm_EP3.4x4.0mm fp

Created by: cyber-murmel

Footprint for e.g. 1.8V Flash Memory Chip

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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 footprint(s) you are contributing Recommended Land Pattern for SST’s, SOIC and WSON Packages page 2 IS25WP032-064-128 page 101
• An example screenshot image is very helpful
• If there are matching symbol or 3D model PRs, provide link(s) as appropriate not yet
• Check the output of the Travis automated check scripts - fix any errors as required