genymotion: refactor src from requireFile to fetchurl

The old src url was updated by the host, making the required file inaccessible. The new url links directly to the required file. This direct link allows us to use fetchurl rather than requireFile.

genymotion: refactor src url

Fixed revisions:
1) Uses `pname`.
2) URL uses version variable in path. Data type for `url` was changed from path to string.

genymotion: refactor src url

Removed redundant `name` definition.

fixed typo in URL

changed requireFile to fetchurl