iperf: Fix compilation with libcxx

Avoids redefining bool.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

package/network/utils/iperf/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=iperf
 PKG_VERSION:=2.0.13
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_HASH:=c88adec966096a81136dda91b4bd19c27aae06df4d45a7f547a8e50d723778ad

package/network/utils/iperf/patches/010-libcxx.patch

@@ -0,0 +1,12 @@
+--- a/config.h.in
++++ b/config.h.in
+@@ -360,7 +360,9 @@
+ #undef _REENTRANT
+ 
+ /* */
++#ifndef __cplusplus
+ #undef bool
++#endif
+ 
+ /* Define to empty if `const' does not conform to ANSI C. */
+ #undef const