doc: Add missing include_directories kwarg to compiler.preprocess()
Fixes:
@@ -604,6 +604,8 @@ methods:
normal compilation. That includes for example args added with
`add_project_arguments()`, or on the command line with `-Dc_args=-DFOO`.
varargs_inherit: _build_target_base
+ kwargs_inherit:
+ - compiler._include_directories
kwargs:
output:
type: str
