Core can now be built in dynamic mode, enabling the hotswap system to be
used.
Hotswap works fine on Windows. Didnt work for me on Debian, the rebuild
and reload process happens but the old version of the module remains for
some reason. Cant figure it out right now
* Adds CMAKE_COMMAND and CMAKE_BINARY_DIR to revision_data.h
* Move the source and mysql exe path handling out of the DBUpdater.
* Make some Config methods const for correctness.
* Remove C & CXX flags from revision_data.h
(was unused and didn't capture all cxx vars)
* Reorder the link order to prevent `ld` from ignoring the file
* Ref #15671
(cherry picked from commit 719159e2074ac2d0902c70bdd3c7a39e0d311bbe)
Aokromes