Smaller makefiles for partial builds

[worksofliam]

As per #137, makefiles were containing the entire project even if doing partial builds.

This improves the ways that makefiles can be generated:

• so -bf make
  • Generates a makefile for the entire project, with the all target having most objects in it.
  • This is how it works today
• so -bf make -f qrpglesrc/file.rpgle
  • Generates a makefile for the entire project, but all is the objects for the given source files (in -f)
  • This is how it works today
• so -bf make -f qrpglesrc/file.rpgle -ip
  • Generates a makefile containing only targets for the specified objects and their children.
  • This results in a smaller makefile
• so -bf make -f qrpglesrc/file.rpgle -ip -wp
  • Generates a makefile containing targets for the specific objects, their children and their parents

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Examples

so -bf make -f qrpglesrc/newdept.pgm.sqlrpgle -ip

Generates:

all: .logs .evfevent library $(PREPATH)/NEWDEPT.PGM

$(PREPATH)/NEWDEPT.PGM: $(PREPATH)/NEWDEPT.FILE $(PREPATH)/DEPARTMENT.FILE

$(PREPATH)/NEWDEPT.PGM: qrpglesrc/newdept.pgm.sqlrpgle
   # ...

$(PREPATH)/NEWDEPT.FILE: qddssrc/newdept.dspf
   # ...

$(PREPATH)/DEPARTMENT.FILE: qsqlsrc/department.table
   # ...