package/s6-linux-init: bump to version 1.0.6.1

package/s6-linux-init: bump to version 1.0.6.1

Build is broken since bump of skalibs to version 2.10.0.2 in commit
4d5587cb56224b2b28f53b0202fb14b2ab32d5fb because skalibs removed
webipc.h in version 2.10.0.0 and
https://github.com/skarnet/skalibs/commit/e557bab0dcaf35f003fa755b74e4c80000e05e42

So bump to version 1.0.6.1 to retrieve the following commit
https://github.com/skarnet/s6-linux-init/commit/ca8d2c96ea09cb33ff6fef33c0314c24fc6a026a

Update hash of COPYING (update in year:
https://github.com/skarnet/s6-linux-init/commit/5e17662d138fc9c9f70a4422eab059c2bdc9432d
https://github.com/skarnet/s6-linux-init/commit/1de5c2d7c63916b11668078445e5f75c054bc898)

While at it, also update indentation in hash file (two spaces)

Fixes:
 - http://autobuild.buildroot.org/results/fe879267675a80bfc5ba17341144feeee53dc197

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>