Move from tests/auto/testlib/selftests/ to
src/testlib/3rdparty/cache2/, so that its path includes a 3rdparty
component and it's isolated from the rest of the selftest files.
Instead, it's now grouped with QtTest's other 3rdparty components, to
make it easier, when doing a 3rdparty update, to see what might need
an update.
In the process, document where in the upstream to find the file to be
copied, if an update is needed. The file is generated, so document its
generator, too, in case its output gets renamed. There is no more
recent release than the 2.13.10 we currently have, so no update will
follow.
Task-number: QTBUG-126080
Change-Id: I371bac233b00318f59d6043fb245ab44b914bf8a
Reviewed-by: Jason McDonald <macadder1@gmail.com>
(cherry picked from commit 31adb73e289d1bd93276af2b1df9bc356ba14766)
1c7c4c5ac9