augeas: bump to version 1.9.0

augeas: bump to version 1.9.0

Add two patches from upstream to fix a build issue when building an
example. Ideally, the examples should not be build at all. However,
upstream disliked the idea of adding configure options like
`--disable-examples` [1]. So we'll make do with the patches and force a
autoreconf.

Additionaly, the signature was checked and a hash for the license file
is added.

[1] https://github.com/hercules-team/augeas/issues/535

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>