devel/genie: add MAKE_JOBS_UNSAFE=yes

When doing a threaded build, I get:Assembler messages:
Fatal error: can't create obj/Release/src/host/lua-5.3.0/src/lcode.o: No such file or directory
Assembler messages:
Fatal error: can't create obj/Release/src/host/lua-5.3.0/src/ldblib.o: No such file or directory
Assembler messages:
Fatal error: can't create obj/Release/src/host/lua-5.3.0/src/lapi.o: No such file or directory
Assembler messages:
Fatal error: can't create obj/Release/src/host/lua-5.3.0/src/lcorolib.o: No such file or directory
Assembler messages:
Fatal error: can't create obj/Release/src/host/lua-5.3.0/src/lfunc.o: No such file or directory
Assembler messages:
Fatal error: can't create obj/Release/src/host/lua-5.3.0/src/lauxlib.o: No such file or directory
Assembler messages:
Fatal error: can't create obj/Release/src/host/lua-5.3.0/src/ldump.o: No such file or directory

PR: 242078
Approved by: swills (maintainer), mentors (implicit approval)