New make target to only build benchmark binaries

For situations where we are cross-building or where we want to avoid
building on the target system, we want a way to only build benchmarks
and then copy them over to the target system to run them.  I have also
added a simple enhancement for the 'bench' target where all benchmark
binaries are built and then the benchmarks executed.

Tested on arm.

	Makefile.in (bench-build): New target.
	Rules (PHONY): Add bench-build target.
	benchtests/Makefile (bench): Depend on bench-build.
	(bench-build): New target.

1 files changed, 7 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index faa1e6396a..a87a0b2b1a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2016-04-20  Siddhesh Poyarekar  <sid@reserved-bit.com>
+
+	Makefile.in (bench-build): New target.
+	Rules (PHONY): Add bench-build target.
+	benchtests/Makefile (bench): Depend on bench-build.
+	(bench-build): New target.
+
 2016-04-19  Samuel Thibault  <samuel.thibault@ens-lyon.org>
 
 	* sysdeps/mach/hurd/profil.c (update_waiter): Initialize