netsniff-ng: check if linux-headers are v3.0 or higher

netsniff-ng uses the TP_STATUS_VLAN_VALID define, provided by the
kernel headers. This definition has been added in the kernel by commit
a3bcc23e890a6d49d6763d9eb073d711de2e0469 ("af-packet: Add flag to
distinguish VID 0 from no-vlan"), which was merged in v3.0.

Fixes:
http://autobuild.buildroot.net/results/c87/c87a440e29ae387f600cb6ecce3caaa08557f4f0/

Signed-off-by: Joris Lijssens <joris.lijssens@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/netsniff-ng/Config.in

@@ -9,6 +9,7 @@ config BR2_PACKAGE_NETSNIFF_NG
 	# Build with uClibc fails due to missing ceill()
 	# Build with musl fails due to various header issues
 	depends on BR2_TOOLCHAIN_USES_GLIBC
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_58854 # liburcu
 	depends on BR2_PACKAGE_LIBURCU_ARCH_SUPPORTS
@@ -17,9 +18,10 @@ config BR2_PACKAGE_NETSNIFF_NG
 	  networking toolkit. If you will, the Swiss army knife for
 	  network packets.
 
-comment "netsniff-ng needs an (e)glibc toolchain w/ threads"
+comment "netsniff-ng needs an (e)glibc toolchain w/ threads, headers >= 3.0"
 	depends on BR2_PACKAGE_LIBURCU_ARCH_SUPPORTS
-	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_USES_GLIBC
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_USES_GLIBC \
+		|| !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
 	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_58854
 
 comment "netsniff-ng needs a toolchain not affected by GCC bug 58854"