Allow Waterfox to work on RISC-V

[Kichura]

Is your feature request related to a problem? Please describe.
Currently Waterfox appears to have a port of PPC64LE available in it's source code meanwhile RISC-V currently does not exist whatsoever.

Describe the solution you'd like
Allow Waterfox to work on the RISC-V architecture so that end-users who happen to be on the RISC-V platform can use this web browser properly for themselves and also to allow development for such port to be maintained for the future.

Describe alternatives you've considered
Have x86_64 be recommended as the main architecture due to it's wider compatibility with software in terms of platform adaption.

Additional information
In the About Waterfox page, it was stated that Waterfox was the first widely distributed 64-bit web browser - hence why i created this issue to find out if this is even remotely considered.