SQL source files that are joined together were
previously listed in the `load_order.txt` and
`extra_extension_files.txt` files. These SQL file list
were then read by CMake. However, since no dependencies
existed on these list files in Make targets, the project
was not automatically rebuilt if the lists were updated.
This change moves the lists directly to the CMakeLists.txt
file, ensuring that the project is properly rebuilt every
time the lists are updated.
bd36e6d020