other: add nextpnr-fpga_interchange to supported toolchains
other: add nextpnr-fpga_interchange to supported toolchains

Signed-off-by: Jan Kowalewski <2e8e4e3eff87a9260f1f165e4a72a8840d9a1b45@antmicro.com>

SymbiFlow/fpga-tool-perf,SymbiFlow/fpga-tool-perf,SymbiFlow/fpga-tool-perf,SymbiFlow/fpga-tool-perf