Update supported version of nextpnr
Newer versions have a proper version number.
@@ -15,7 +15,7 @@ cd -
git clone https://github.com/YosysHQ/nextpnr nextpnr
cd nextpnr
-git checkout c73d4cf6
+git checkout nextpnr-0.2
cmake -DARCH=ice40 -DCMAKE_INSTALL_PREFIX=/usr/local .
make -j$(nproc)
sudo make install
