[source] build: prepare config.seed before package compilation

[LEDE Commits]

stintel pushed a commit to source.git, branch master:
https://git.lede-project.org/3ceb0fa7c587e10748d70c9ec860d9b0ab16549e

commit 3ceb0fa7c587e10748d70c9ec860d9b0ab16549e
Author: Vitaly Chekryzhev <13hakta at gmail.com>
AuthorDate: Fri Jan 6 16:47:18 2017 +0500

    build: prepare config.seed before package compilation
    
    Signed-off-by: Vitaly Chekryzhev <13hakta at gmail.com>
---
 Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 670e6a2..09db75c 100644
--- a/Makefile
+++ b/Makefile
@@ -92,9 +92,10 @@ diffconfig: FORCE
 	$(SCRIPT_DIR)/diffconfig.sh > $(BIN_DIR)/config.seed
 
 prepare: .config $(tools/stamp-compile) $(toolchain/stamp-compile)
+	$(_SINGLE)$(SUBMAKE) -r diffconfig
+
 world: prepare $(target/stamp-compile) $(package/stamp-compile) $(package/stamp-install) $(target/stamp-install) FORCE
 	$(_SINGLE)$(SUBMAKE) -r package/index
-	$(_SINGLE)$(SUBMAKE) -r diffconfig
 	$(_SINGLE)$(SUBMAKE) -r checksum
 
 .PHONY: clean dirclean prereq prepare world package/symlinks package/symlinks-install package/symlinks-clean