swupdate: bump to version 2017.11

swupdate: bump to version 2017.11

Remove upstream patch 0001-Fix-SHA256-hash-verification.patch.

Re-enable support for Lua 5.1 and LuaJIT, which was removed in version 2017.09
because of compatibility issues [1]. Meanwhile, the issues have been resolved
upstream [2].

Note, that `CONFIG_HANDLER_IN_LUA` is now supported by Lua 5.1/LuaJIT, too.

Add a fixup command `SWUPDATE_SET_LUA_VERSION` to set the correct base name for
the Lua/LuaJIT pkg-config file used by the swupdates config option `LUAPKG`.

Fix a small type in the help text:
  'in my mind' -> 'in mind'.

Regenerated the .config script by doing:

```
make swupdate-menuconfig
make swupdate-update-config
```
.. and removing the paths for the build options manually.

[1] http://patchwork.ozlabs.org/patch/795958/
[2] https://github.com/sbabic/swupdate/commit/7b49b8dc59acc0591fe9823f1739ba7422eb30c7

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>