package/haveged: bump to version 1.9.4
See https://github.com/jirka-h/haveged/releases/tag/1.9.4
Also change the site location, upstream release
mechanism has switched to using github.
Signed-off-by: Pierre-Jean Texier <pjtexier@koncepto.io>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>