[PATCH] Split Multimage Makefile rule in explicit and implicit parts

[Lucas Stach]

Fixes build with make version >=3.82

Frome the make 3.82 NEWS file:
* WARNING: Backward-incompatibility!
  In previous versions of make it was acceptable to list one or more explicit
  targets followed by one or more pattern targets in the same rule and it
  worked "as expected".  However, this was not documented as acceptable and if
  you listed any explicit targets AFTER the pattern targets, the entire rule
  would be mis-parsed.  This release removes this ability completely: make
  will generate an error message if you mix explicit and pattern targets in
  the same rule.

Signed-off-by: Lucas Stach <dev at lynxeye.de>
---
Feel free to squash this into the offending commit.
---
 Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index d82e795..811b658 100644
--- a/Makefile
+++ b/Makefile
@@ -481,7 +481,9 @@ export KBUILD_BINARY ?= barebox.bin
 barebox-flash-image: $(KBUILD_IMAGE) FORCE
 	$(call if_changed,ln)
 
-images images/%.s: barebox.bin FORCE
+images: barebox.bin FORCE
+	$(Q)$(MAKE) $(build)=images $@
+images/%.s: barebox.bin FORCE
 	$(Q)$(MAKE) $(build)=images $@
 
 ifdef CONFIG_PBL_MULTI_IMAGES
-- 
1.8.3.1