package/python-pyliftdi: fix patch

package/python-pyliftdi: fix patch

The 0001 patch introduces leading tabs, when the rest of the file is
using leading spaces, and python3 does not like that.

Fixes:
    http://autobuild.buildroot.org/results/e24/e24a8e6f62139ab0efbce7a32c3d88c2cba839c6/
    http://autobuild.buildroot.org/results/7b1/7b14c4bb4cac3ff006e77330cbd7b839ad80192a/
    http://autobuild.buildroot.org/results/67c/67cddfdb801e83acfd9f197f5661fd43fa38a092/
    [...]

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Christian Kellermann <christian.kellermann@solectrix.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>