iozone: depends on toolchain with NPTL support

The existent patch is not enough, as pthread_barrier_wait is used, which
isn't implemented in uClibc-ng Linuxthreads.
Remove the patch.

Fixes:

  http://autobuild.buildroot.net/results/e5bbb80c81f4f170cf48d375e016e87a296ff754/

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/iozone/0002-no-nptl-support.patch

@@ -1,37 +0,0 @@
-Dummy pthread_setaffinity_np() when not available
-
-On uClibc configurations that do not use the NPTL thread
-implementation, pthread_setaffinity_np() is not available. This patch
-defines a dummy (empty) implementation of this function for such
-cases.
-
-The only few architectures that do not provide the NPTL thread
-implementation are very likely to be non-SMP architectures, and
-therefore, setting the affinity of the thread is not doing anything
-useful, so having an empty stub for pthread_setaffinity_np() is not a
-problem.
-
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-
-Index: b/src/current/iozone.c
-===================================================================
---- a/src/current/iozone.c
-+++ b/src/current/iozone.c
-@@ -306,6 +306,17 @@
- #endif
- #endif
- 
-+#if defined (__linux__)
-+#include <features.h>
-+#if defined (__UCLIBC__) && !defined (__UCLIBC_HAS_THREADS_NATIVE__)
-+static int pthread_setaffinity_np(pthread_t thread, size_t cpusetsize,
-+				  const cpu_set_t *cpuset)
-+{
-+	return 0;
-+}
-+#endif
-+#endif
-+
- #if ((defined(solaris) && defined(__LP64__)) || defined(__s390x__))
- /* If we are building for 64-bit Solaris, all functions that return pointers
-  * must be declared before they are used; otherwise the compiler will assume

package/iozone/Config.in

@@ -1,9 +1,13 @@
 config BR2_PACKAGE_IOZONE
 	bool "iozone"
 	depends on BR2_USE_MMU # fork()
-	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL
 	help
 	  IOzone is a filesystem benchmark tool.
 	  The benchmark generates and measures a variety of file operations
 
 	  http://www.iozone.org/
+
+comment "iozone needs a toolchain w/ NPTL"
+	depends on BR2_USE_MMU
+        depends on !BR2_TOOLCHAIN_HAS_THREADS_NPTL