debian/patches: add patches for combined context support
This MR tries to forward-port Canonical's combined PR patches [1], and incorporate changes brought in by !11 (closed) in a more manageable pieces of patches.
The "merge APN" part of this MR is now moved to !15 (closed).
[1] Primarily https://github.com/rilmodem/ofono/pull/62, but also other commits.
Fixes: #2 (closed)
Fixes: #8 (closed)
Edited by Ratchanan Srirattanamet