Fix Rules.mk blanking out dependencies, fix incorrect actions.json usage

[worksofliam]

@SanjulaGanepola found a bug in ibmi-company_system where the makefile targets were missing POPEMP and POPDEPT causing an error in the build:

I confirmed that:

$(PREPATH)/DEPTS.PGM: $(PREPATH)/EMPLOYEES.PGM $(PREPATH)/NEWEMP.PGM $(PREPATH)/DEPARTMENT.FILE $(PREPATH)/DEPTS.FILE
$(PREPATH)/EMPDET.SRVPGM: $(PREPATH)/EMPDET.MODULE
$(PREPATH)/EMPDET.MODULE: $(PREPATH)/EMPLOYEE.FILE $(PREPATH)/DEPARTMENT.FILE
$(PREPATH)/EMPLOYEES.PGM: $(PREPATH)/APP.BNDDIR $(PREPATH)/EMPLOYEE.FILE $(PREPATH)/EMPS.FILE
$(PREPATH)/NEWEMP.PGM: $(PREPATH)/EMPLOYEE.FILE $(PREPATH)/NEMP.FILE
$(PREPATH)/TEMPDET.MODULE: $(PREPATH)/EMPLOYEE.FILE $(PREPATH)/DEPARTMENT.FILE $(PREPATH)/EMPDET.SRVPGM
$(PREPATH)/APP.BNDDIR: $(PREPATH)/EMPDET.SRVPGM

This was due to some logic in how we interpret the Rules.mk files when building the makefile. We were letting those rules override the dependencies that were found by SO. Here is how the rules were setup for those objects:

POPDEPT.PGM: popdept.sqlprc
POPEMP.PGM: popemp.sqlprc

---

Additionally, a bug has been fixed where the incorrect command was being generated in the makefile. This was due to a new feature that was added for 'steps' (not yet out) and was being included as part of the makefile by default. This caused incorrect commands to be used when actions.json existed, causing a break in existing builds.

---

This fix, instead of removing the existing rules, combines them with the rules defined in Rules.mk. Also, fixes a small bug with adding dependencies from SQL sources.

[SanjulaGanepola]

Looks good, thanks!