blktrace: drop NPTL dependency

The latest uClibc-ng version (1.0.30) provides clock_nanosleep() even
for non NPTL configurations.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/blktrace/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_BLKTRACE
 	bool "blktrace"
-	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL # clock_nanosleep()
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_USE_MMU # system()
 	select BR2_PACKAGE_LIBAIO
 	help
@@ -10,6 +10,6 @@ config BR2_PACKAGE_BLKTRACE
 
 	  http://git.kernel.dk/?p=blktrace.git;a=summary
 
-comment "blktrace needs a toolchain w/ NPTL"
+comment "blktrace needs a toolchain w/ threads"
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_HAS_THREADS_NPTL
+	depends on !BR2_TOOLCHAIN_HAS_THREADS