[COMMITTED] benchtests: Clean up extra-objs

[Siddhesh Poyarekar]

The bench-clean target would leave behind json-lib.o.  Fix up to clean
up all extra-objs registered in benchtests.
---
 ChangeLog           | 2 ++
 benchtests/Makefile | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index e16c557..f26f8f8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2016-04-20  Siddhesh Poyarekar  <sid@reserved-bit.com>
 
+	* benchtests/Makefile (bench-clean): Clean up extra-objs.
+
 	* benchtests/README: Update README to include instructions on
 	using bench-build.
 
diff --git a/benchtests/Makefile b/benchtests/Makefile
index a05974e..779eb39 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -112,7 +112,9 @@ cpp-srcs-left := $(binaries-benchset:=.c) $(binaries-bench:=.c) \
 lib := nonlib
 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
 
-extra-objs += json-lib.o
+bench-extra-objs = json-lib.o
+
+extra-objs += $(bench-extra-objs)
 
 bench-deps := bench-skeleton.c bench-timing.h Makefile
 
@@ -127,6 +129,7 @@ bench-clean:
 	rm -f $(binaries-benchset) $(addsuffix .o,$(binaries-benchset))
 	rm -f $(binaries-bench-malloc) $(addsuffix .o,$(binaries-bench-malloc))
 	rm -f $(timing-type) $(addsuffix .o,$(timing-type))
+	rm -f $(addprefix $(objpfx),$(bench-extra-objs))
 
 bench: $(timing-type) $(gen-locales) bench-build bench-set bench-func \
 	bench-malloc
-- 
2.5.5