CMake Nightly Date Stamp
Generate the _IMPORT_PREFIX in the non-config export file.
Add the INSTALL_PREFIX genex.
Merge topic 'fix-relocatable-include-dirs' into next

34d1ade Add the INSTALL_PREFIX genex.
3a17197 Generate the _IMPORT_PREFIX in the non-config export file.
f7db6d1 CMake Nightly Date Stamp