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/yapp.mk

@@ -1,28 +0,0 @@
-SRC_ALL_CPP                 += main.cpp
-YAPP_INCLUDE_DIR            ?= .
-YAPP_CLASS                  ?= $(firstword $(basename $(notdir $(wildcard $(addprefix \
-		    $(YAPP_INCLUDE_DIR)/, YApp*.h App*.h Y*.h *.h)))))
-YAPP_CLASS_H                ?= $(firstword $(wildcard $(addsuffix /$(YAPP_CLASS).h,\
-	$(YAPP_INCLUDE_DIR) $(subst -I,,$(FINAL_INCLUDE)))) $(YAPP_CLASS).h)
-YAPP_NAMESPACE              ?=
-
-ifneq ($(TARGET),mingw)
-FINAL_LDFLAGS               += -rdynamic
-endif
-
-include $(JWBDIR)/make/exe.mk
-
-all: build_EXE
-install: install_EXE
-clean: clean.yapp
-distclean:
-
-clean.yapp:
-	$(RM) -f main.cpp
-
-main.cpp: $(YAPP_CLASS_H)
-	echo "#include \"$<\"" > $@.tmp
-	if [ "$(YAPP_NAMESPACE)" ]; then echo "using namespace $(YAPP_NAMESPACE);" >> $@.tmp; fi
-	echo "#include <ytools/YAppRunner.h>" >> $@.tmp
-	echo "yapp_main($(YAPP_CLASS))" >> $@.tmp
-	mv $@.tmp $@