package/libzenoh-pico: needs threads

Fixes:
http://autobuild.buildroot.net/results/c9138c32157042aa5bb1bfd3a8446e4c9361d0f5/

Signed-off-by: Alex Michel <alex.michel@wiedemann-group.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/libzenoh-pico/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_LIBZENOH_PICO
 	bool "libzenoh-pico"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	help
 	  zenoh-pico is the Eclipse zenoh implementation that targets
 	  constrained devices and offers a native C API. It is fully