iperf: fix tarball hashes changed upstream

Upstream uploaded a new tarball with the same version number 2016-09-08,
some time after the update to v2.0.9 in buildroot. Someone noticed, but
upstream set the ticket to wontfix, and promised to do better in the
future: https://sourceforge.net/p/iperf2/tickets/20/

Signed-off-by: Alexander Dahl <post@lespocky.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/iperf/iperf.hash

@@ -1,4 +1,4 @@
 # From https://sourceforge.net/projects/iperf2/files/
-sha1	9e215f6af8edd97f947f2b0207ff5487845d83d4	iperf-2.0.9.tar.gz
+sha1	59820895df9106ba189ccfdc5677077535ad50e7	iperf-2.0.9.tar.gz
 # Locally computed:
-sha256  a5350777b191e910334d3a107b5e5219b72ffa393da4186da1e0a4552aeeded6  iperf-2.0.9.tar.gz
+sha256  db02911f35686e808ed247160dfa766e08ae3f59d1e7dcedef0ffb2a6643f0bf  iperf-2.0.9.tar.gz