Everywhere: Remove everything non-essential for "make clean all"

This commit removes everything not strictly necessary for running
"make clean all" inside jw-build.

packaging jw-devtest. This cuts the repo down from 24077 to 4725
lines of code.

The idea is to

1) Further remove bloat from the remaining bits

2) Re-add what's necessary to build and package other essential repos.

   The decision should be based on whether or not jw-build can also be
   useful in a non-janware context.

Signed-off-by: Jan Lindemann <jan@janware.com>

make/include.mk

@@ -1,44 +0,0 @@
-include $(JWBDIR)/make/defs.mk
-include $(JWBDIR)/make/defs-cpp.mk
-include $(JWBDIR)/make/dev-utils.mk
-
-# variables
-SRC_H        += $(PROJ_H) $(wildcard $(HDRDIR_SCOPE_SUFFIX)/*.h)
-
-# mandatory targets
-all: $(PROJ_H)
-clean: clean.include
-install: install_HDR
-
-# not wäry naaice
-ifneq ($(HDRDIR_SCOPE_SUFFIX),)
-install_HDR: dir_install_hdr_suffix.done
-
-dir_install_hdr_suffix.done:
-	$(INSTALL) -d -o $(HDRDIROWNER) -g $(HDRDIRGROUP) -m $(HDRDIRMODE) $(INSTALL_HDRDIR)/$(HDRDIR_SCOPE_SUFFIX)
-	touch $@
-endif
-
-# convenience targets
-project-header: $(PROJ_H)
-
-# rules
-clean.include:
-	$(RM) -rf *.h *~ .*.swp *.done $(PROJ_H) $(HDRDIR_SCOPE_SUFFIX)
-
-$(PROJ_H): $(filter-out $(PROJ_H) $(PROJECT)/$(PROJ_H),$(wildcard *.h $(PROJECT)/*.h))
-	echo "#ifndef _$(PROJECT_CAPNAME)_H" > $@.tmp
-	echo "#define _$(PROJECT_CAPNAME)_H" >> $@.tmp
-	echo >> $@.tmp
-	for h in $(sort $(patsubst $(PROJECT)/%,%,$^)); do echo "#include <$(PROJECT)/$$h>"; done >> $@.tmp
-	echo >> $@.tmp
-	echo "#endif /* #ifndef _$(PROJECT_CAPNAME)_H */" >> $@.tmp
-	mv $@.tmp $@
-
-install-links:
-	DEVELOPMENT=false make do-install-links
-
-do-install-links:
-	@$(call install_links,HDR)
-
-include $(JWBDIR)/make/rules.mk