iperf: resolve issues with gcc6

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-benchmark/iperf/iperf-2.0.5/0002-fix-bool-size-m4.patch

@@ -0,0 +1,16 @@
+--- iperf-2.0.5/m4/dast.m4.orig	2016-06-15 11:42:03.945581785 -0400
++++ iperf-2.0.5/m4/dast.m4	2016-06-15 11:42:11.053581641 -0400
+@@ -11,7 +11,12 @@
+ 
+ AC_DEFUN(DAST_CHECK_BOOL, [
+ 
+-AC_CHECK_SIZEOF(bool)
++if test "$ac_cv_header_stdbool_h" = yes; then
++  AC_CHECK_SIZEOF(bool,,[#include <stdbool.h>])
++else
++    AC_CHECK_SIZEOF(bool)
++fi
++
+ if test "$ac_cv_sizeof_bool" = 0 ; then
+   AC_DEFINE(bool, int)
+ fi

meta-oe/recipes-benchmark/iperf/iperf_2.0.5.bb

@@ -7,6 +7,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=e8478eae9f479e39bc34975193360298"
 SRC_URI = " ${SOURCEFORGE_MIRROR}/iperf/${BP}.tar.gz \
             file://iperf-2.0.5_ManPage.patch \
             file://0001-fix-out-of-tree-config.patch \
+            file://0002-fix-bool-size-m4.patch \
           "
 
 SRC_URI[md5sum] = "44b5536b67719f4250faed632a3cd016"
@@ -17,6 +18,3 @@ S = "${WORKDIR}/${BP}"
 inherit autotools pkgconfig
 
 EXTRA_OECONF = "--exec-prefix=${STAGING_DIR_HOST}${layout_exec_prefix}"
-
-# http://errors.yoctoproject.org/Errors/Details/68671/
-PNBLACKLIST[iperf] ?= "BROKEN: fails to build with gcc-6"