LibreOffice Enables RISC-V 64-bit Support

If the royalty free open-source processor ISA RISC-V is to enjoy success on the Linux desktop, obviously it needs an office suite... LibreOffice as the open-source office suite alternative to Microsoft Office is now seeing proper RISC-V 64-bit support.

Merged on Thursday was officially adding support for RISC-V 64-bit (RISCV64) to this open-source office suite. The gbuild has been properly updated for RISC-V as well as adding a UNO bridge for RISC-V 64-bit.

Details within this commit for those interested in RISC-V build support for the LibreOffice open-source, cross-platform office suite.