[core] partially rollback 8cb4a2b4, make incremental builds work again

cfg/Makefile

 obj += cfg/warning.o
 obj += cfg/tarantool_$(module)_cfg.o
 
-$(obj): cfg/tarantool_cfg.h
-.PHONY: cfg/tarantool_cfg.h
-cfg/tarantool_cfg.h: cfg/tarantool_$(module)_cfg.h
-	@mkdir -p cfg
-	@ln -sf $(abspath $<) $@
-
 ifeq ($(HAVE_CONFETTI),1)
-cfg/tarantool_$(module)_cfg.h: cfg/tarantool_$(module)_cfg.cfg_tmpl
+$(obj): cfg/tarantool_$(module)_cfg.h cfg/tarantool_$(module)_cfg.cfg
 cfg/tarantool_$(module)_cfg.cfg_tmpl: cfg/core_cfg.cfg_tmpl $(cfg_tmpl)
 	@mkdir -p $(dir $@)
 	@echo '%{ ' > $@
@@ -19,4 +13,5 @@ cfg/tarantool_$(module)_cfg.cfg_tmpl: cfg/core_cfg.cfg_tmpl $(cfg_tmpl)
 	$(CAT) $^ >> $@
 endif
 
+CFLAGS += -DTARANTOOL_CONFIG='<cfg/tarantool_$(module)_cfg.h>'
 cfg/tarantool_$(module)_cfg.o: CFLAGS += -Wno-unused

include/tarantool.h

@@ -30,7 +30,7 @@
 #include <tbuf.h>
 #include <util.h>
 #include <log_io.h>
-#include <cfg/tarantool_cfg.h>
+#include TARANTOOL_CONFIG
 
 struct recovery_state *recovery_state;
 void mod_init(void);

scripts/indent

@@ -2,8 +2,6 @@
 INDENT=$(which gindent 2>/dev/null || which indent 2>/dev/null)
 [ -z $INDENT ] && echo indent binary not found && exit 1
 
-CPP_FLAGS="-I. -Iinclude -DCORO_ASM -DSTORAGE"
-
 for f in $@
 do
 	PARAM="-npro -kr -i8 -ts8 -ci8 -sob -l100 -ss -ncs -cp1
@@ -21,7 +19,7 @@ do
 			;;
 	esac
 
-	PARAM="$PARAM "$(scripts/custom_types $f $CPP_FLAGS | grep -v '^"_' | sed 's/"//g; s/^/-T /')
+	PARAM="$PARAM "$(scripts/custom_types $f -I. -Iinclude -DCORO_ASM -DSTORAGE -DTARANTOOL_CONFIG='<cfg/tarantool_silverbox_cfg.h>' | grep -v '^"_' | sed 's/"//g; s/^/-T /')
 
 	$INDENT $PARAM $f
 done