Fix benchtests build failure after 'add benchmark for strcoll'

This patch fixes implicit declaration of function strdup, strtok,
strcoll, strchr and removes unused variable res.

ChangeLog:

	* benchtests/bench-strcoll.c:
	Include string.h.
	(main): Remove unused variable res.

1 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 541eecedb8..7dedfb419a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2015-06-19  Stefan Liebler  <stli@linux.vnet.ibm.com>
 
+	* benchtests/bench-strcoll.c:
+	Include string.h.
+	(main): Remove unused variable res.
+
+2015-06-19  Stefan Liebler  <stli@linux.vnet.ibm.com>
+
 	* timezone/Makefile (%/UTC %/Universal):
 	Generate test-result files for UTC and Universal.