network-manager: bump to 0.9.8.0

This upstream version (the latest available at the time of this
writing) contains
http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=6b64e4db2f3c9cfc0e0e240cf0bc58f3b3e90c1f


which fixes a build issue of network-manager against recent kernel
headers.

We also remove our patch against network-manager, because it has been
merged upstream as commit cbf72aeb34a6f1fd1bcd7f78ae88985154dc85af.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>