install.c: Enable ubifs support
install.c: Enable ubifs support

* Copying to an ubi volume requires calling an extra ioctl with the
  desired image size as argument. This checks if the image fits into the
  volume and prepares to write. Without the ioctl a copy would silently
  copy 0 bytes.

Signed-off-by: Enrico Jorns <a2e5f936c390f36494e46e71bcfbe365bb1e8c49@pengutronix.de>

ejoerns/rauc,jluebbe/rauc,jluebbe/rauc,rauc/rauc,ejoerns/rauc,rauc/rauc,ejoerns/rauc,jluebbe/rauc,rauc/rauc