GenericSystem: Remove misspelled flag default
In CMakeGenericSystem, it should be CMAKE_INCLUDE_SEP_<LANG>
and not
CMAKE_INCLUDE_<LANG>_SEP
. However, if the flag is defined, include
behavior changes to Java-style non-repeating flags, which isn't
intended. Therefore, removing the (misspelled) default initialization
should help remove confusion and unintended side effects.
Topic-rename: generic-inc-sep-typo-remove
Edited by Brad King