package/nut: needs threads

threads are mandantory since bump to version 2.8.2 in commit
4edd837ac0193db83202030ee2997ac811e6bc45 and
https://github.com/networkupstools/nut/commit/ff401e538bcbead62a3532887135518ef9e779df:

In file included from nutipc.cpp:38:
../include/nutipc.hpp:455:3: error: 'pthread_t' does not name a type
  455 |   pthread_t m_impl;
      |   ^~~~~~~~~

Fixes: 4edd837ac0193db83202030ee2997ac811e6bc45
 - http://autobuild.buildroot.org/results/d16a24d60b298d7616a516ec0c6c30696ed93a58

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/collectd/Config.in

@@ -430,13 +430,14 @@ config BR2_PACKAGE_COLLECTD_NTPD
 config BR2_PACKAGE_COLLECTD_NUT
 	bool "nut"
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_PACKAGE_NUT
 	help
 	  The NUT plugin collects uninterruptible power supply (UPS)
 	  statistics using the Network UPS Tools (NUT).
 
-comment "nut needs a toolchain w/ C++"
-	depends on !BR2_INSTALL_LIBSTDCPP
+comment "nut needs a toolchain w/ C++, threads"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS
 
 config BR2_PACKAGE_COLLECTD_OLSRD
 	bool "olsrd"

package/nut/Config.in

@@ -1,11 +1,12 @@
-comment "nut needs a toolchain w/ C++"
+comment "nut needs a toolchain w/ C++, threads"
 	depends on BR2_USE_MMU
-	depends on !BR2_INSTALL_LIBSTDCPP
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS
 
 config BR2_PACKAGE_NUT
 	bool "nut"
 	depends on BR2_USE_MMU # fork()
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	help
 	  Network UPS tools