package/weston: requires kernel headers >= 3.0

It needs K_OFF, introduced in 2.6.39.

Since we do not have dependencies on kernel headers before 3.0,
just depend on kernel headers 3.0.

Fixes:
    http://autobuild.buildroot.net/results/aa5/aa54b1aaf0ac89531d7a1e7dd3900b35605ae3f5

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/weston/Config.in

@@ -1,6 +1,6 @@
-comment "weston needs udev and a toolchain w/ threads"
+comment "weston needs udev and a toolchain w/ threads, headers >= 3.0"
 	depends on !BR2_avr32
-	depends on !BR2_PACKAGE_HAS_UDEV || !BR2_TOOLCHAIN_HAS_THREADS
+	depends on !BR2_PACKAGE_HAS_UDEV || !BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
 
 config BR2_PACKAGE_WESTON
 	bool "weston"
@@ -14,6 +14,7 @@ config BR2_PACKAGE_WESTON
 	depends on BR2_PACKAGE_HAS_UDEV
 	depends on !BR2_avr32 # wayland
 	depends on BR2_TOOLCHAIN_HAS_THREADS # wayland
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
 	# Runtime dependency
 	select BR2_PACKAGE_XKEYBOARD_CONFIG
 	# Make sure at least one compositor is selected.