iozone: set ctarget=armv7a-cros-linux-gnueabihf for ARM

This change the ctarget from armv7a-cros-linux-gnueabi to
armv7a-cros-linux-gnueabihf for ARM as we are changing toolchain
names for ARM32.

BUG=chromium:711369
TEST=None

Change-Id: I4214138ad71fbe77576fbff873c6958e250e760b
Reviewed-on: https://chromium-review.googlesource.com/1241542
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
diff --git a/client/tests/iozone/iozone.py b/client/tests/iozone/iozone.py
index 2c1b043..d04062b 100644
--- a/client/tests/iozone/iozone.py
+++ b/client/tests/iozone/iozone.py
@@ -39,7 +39,7 @@
 
         ctarget = os.getenv('CTARGET_default')
 
-        if (ctarget == 'armv7a-cros-linux-gnueabi'):
+        if (ctarget == 'armv7a-cros-linux-gnueabihf'):
             utils.make('linux-arm')
         elif (ctarget == 'i686-pc-linux-gnu'):
             utils.make('linux')