package/tvheadend: requires kernel headers >= 3.2

tvheadend requires SYS_TURBO, introduced in linux 3.2.

Fixes:
    http://autobuild.buildroot.net/results/4df/4df8cd85e0287910567df81c0394b2914570e98a

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

package/tvheadend/Config.in

@@ -1,10 +1,11 @@
-comment "tvheadend needs a toolchain w/ largefile, IPv6, NPTL"
-	depends on !BR2_LARGEFILE || !BR2_INET_IPV6 || !BR2_TOOLCHAIN_HAS_THREADS_NPTL
+comment "tvheadend needs a toolchain w/ largefile, IPv6, NPTL, headers >= 3.2"
+	depends on !BR2_LARGEFILE || !BR2_INET_IPV6 || !BR2_TOOLCHAIN_HAS_THREADS_NPTL || !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
 
 config BR2_PACKAGE_TVHEADEND
 	bool "tvheadend"
 	depends on BR2_LARGEFILE && BR2_INET_IPV6
 	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
 	# tvheadend requires an atomic_add operation. Either you have
 	# a gcc >= 4.3 toolchain and it uses the gcc intrinsics, or it
 	# has special code for x86, x86-64, PPC and ARM. So in the