wayland: needs threads

Fixes:
http://autobuild.buildroot.net/results/383/383c6ac297250f87db9d03afa38d45b2c1adcb47/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/multimedia/gst1-plugins-bad/Config.in

@@ -355,6 +355,7 @@ config BR2_PACKAGE_GST1_PLUGINS_BAD_PLUGIN_DIRECTFB
 
 config BR2_PACKAGE_GST1_PLUGINS_BAD_PLUGIN_WAYLAND
 	bool "wayland"
+	depends on BR2_TOOLCHAIN_HAS_THREADS # wayland
 	select BR2_PACKAGE_WAYLAND
 	help
 	  Wayland Video Sink

package/wayland/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_WAYLAND
 	bool "wayland"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_PACKAGE_LIBFFI
 	select BR2_PACKAGE_EXPAT
 	help
@@ -8,3 +9,6 @@ config BR2_PACKAGE_WAYLAND
 	  of the protocol.
 
 	  http://wayland.freedesktop.org/
+
+comment "wayland requires a toolchain with thread support"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/weston/Config.in

@@ -11,6 +11,7 @@ config BR2_PACKAGE_WESTON
 	select BR2_PACKAGE_JPEG
 	select BR2_PACKAGE_MTDEV
 	depends on BR2_PACKAGE_UDEV
+	depends on BR2_TOOLCHAIN_HAS_THREADS # wayland
 	# Runtime dependency
 	select BR2_PACKAGE_XKEYBOARD_CONFIG
 	# Make sure at least one backend is selected