Exit if architecture is not detected for IPFS install

src/freedombone-app-ipfs

             echo $"Using $IPFS_ARCH"
         fi
     fi
+    if [ ! $IPFS_ARCH ]; then
+        echo $'Architecture not detected for IPFS install'
+        exit 738765235
+    fi
 
     IPFS_FILE=go-ipfs_v${IPFS_GO_VERSION}_linux-${IPFS_ARCH}.tar.gz
     wget https://ipfs.io/ipns/dist.ipfs.io/go-ipfs/v${IPFS_GO_VERSION}/${IPFS_FILE}