Parallel builds sometimes fail with the following error:
eeschema/sch_plugins/kicad/sch_sexpr_parser.h:36:10: fatal error: schematic_lexer.h: No such file or directory
This can be reproduced by running the following in an empty build
subdirectory:
cmake .. -G Ninja -DWHATEVER_IS_NEEDED...
ninja qa/schematic_utils/libqa_schematic_utils.a
We fix this by adding explicit dependency between qa_schematic_utils
and eeschema_kiface_objects, which builds schematic_lexer.h.