Makefile: Fix RECURSIVE_RULE with nested subdirectories

The rule produces dependencies for .a files in subdirectories. After
moving FFmpeg subdirectories under ffmpeg/ "$(part)/$(part).a:" gave
results like "ffmpeg/libavutil/ffmpeg/libavutil.a:". Fix it to produce
"ffmpeg/libavutil/libavutil.a".

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 7a9f720c74..e7213bdb89 100644
--- a/Makefile
+++ b/Makefile
@@ -689,7 +689,7 @@ dep depend: $(DEPS)
 	for part in $(PARTS); do $(MAKE) -C $$part depend; done
 
 define RECURSIVE_RULE
-$(part)/$(part).a:
+$(part)/$(notdir $(part)).a:
 	$(MAKE) -C $(part)
 endef