package/hidapi: depends on NPTL threads

hidapi use NPTL threads functions like pthread_barrier_wait() and
pthread_barrier_destroy(). So the dependency on threads support
doesn't come from libusb package but by hidapi itself.

Fixes:
[microblaze]
http://autobuild.buildroot.net/results/f7e/f7e778562aa1a65ba46f3b2f705d13ace8870805
[m68k]
http://autobuild.buildroot.net/results/2ec/2ecd240ccb15de76017942a8960faac6b3f973b4

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/hidapi/Config.in

@@ -1,7 +1,7 @@
 config BR2_PACKAGE_HIDAPI
 	bool "hidapi"
 	depends on BR2_PACKAGE_HAS_UDEV
-	depends on BR2_TOOLCHAIN_HAS_THREADS # libusb
+	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL
 	select BR2_PACKAGE_LIBUSB
 	select BR2_PACKAGE_LIBGUDEV
 	select BR2_PACKAGE_LIBICONV if !BR2_ENABLE_LOCALE
@@ -12,5 +12,5 @@ config BR2_PACKAGE_HIDAPI
 
 	  http://www.signal11.us/oss/hidapi/
 
-comment "hidapi needs udev /dev management and a toolchain w/ threads"
-	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_PACKAGE_HAS_UDEV
+comment "hidapi needs udev /dev management and a toolchain w/ NPTL threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS_NPTL || !BR2_PACKAGE_HAS_UDEV