Makefile: Simplify Makefile.unikernel

Move file generation rules (.config, model.h, tokenizer.h) out of
`Makefile.unikernel` and into `Makefile`. This simplifies
`Makefile.unikernel` making it Unikraft-specific. And making it easy to
reuse as part of `make -f Makefile.unikraft ...` rules.

Signed-off-by: Razvan Deaconescu <razvand@unikraft.io>

Makefile

@@ -183,6 +183,10 @@ run_unik_qemu_x86_64: run.c
 	[ ! -d "UNIK" ] && echo "Cloning unikraft and musl sources..." || true
 	[ ! -d "UNIK/unikraft" ] && git clone https://github.com/unikraft/unikraft UNIK/unikraft || true
 	[ ! -d "UNIK/libs/musl" ] && git clone https://github.com/unikraft/lib-musl UNIK/libs/musl || true
+	UK_DEFCONFIG=$(shell pwd)/defconfigs/qemu-x86_64 make -f Makefile.unikernel defconfig
+	gcc -Ofast strliteral.c -o strlit
+	./strlit -i emb_Model_data $(MOD_PATH) model.h
+	./strlit -i emb_Tokenizer_data $(TOK_PATH) tokenizer.h
 	make -f Makefile.unikernel
 
 # Build for termux on Android

Makefile.unikernel

@@ -1,15 +1,8 @@
 UK_ROOT ?= $(PWD)/UNIK/unikraft
 UK_LIBS ?= $(PWD)/UNIK/libs
 LIBS := $(UK_LIBS)/musl
-# Model / Tokenizer Paths
-MOD_PATH    = out/model.bin
-TOK_PATH    = tokenizer.bin
 
 all:
-	UK_DEFCONFIG=$(shell pwd)/defconfigs/qemu-x86_64 make -f Makefile.unikernel defconfig
-	gcc -Ofast strliteral.c -o strlit
-	./strlit -i emb_Model_data $(MOD_PATH) model.h
-	./strlit -i emb_Tokenizer_data $(TOK_PATH) tokenizer.h
 	@$(MAKE) -C $(UK_ROOT) A=$(PWD) L=$(LIBS)
 
 $(MAKECMDGOALS):