[TASK] Make sure source code is correctly linked on each public post

[Thaodan]

XDA complained that the kernel GPL components were not linked properly. This and the forum post both stated this Github projects address which contains all sources either created by us or modified.
However this wasn't exact enough for them.

[Thaodan]

Updated the XDA post to contain a section to mention the source code location:

Sources​
Any sources specific to this port can be found inside the project linked above. The device repositories are named after the devices board name for example in this case kumano.

All our sources are included inside the project linked above.

All other sources are taken unpatched from upstream which is either Sony-AOSP or SailfishOS/mer-hybris.
If changes are needed inside upstream repositories these are submitted to the upstream repositories.
This GPL includes components such as the kernel or libhybris.