package/dawgdic: needs gcc >= 4.7

std::strtoll is only supported since C++11.

Fixes:
http://autobuild.buildroot.net/results/cae/cae3cda9be779ea8359f94d13bbbca97e68495ca/

Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/dawgdic/Config.in

@@ -1,6 +1,8 @@
 config BR2_PACKAGE_DAWGDIC
 	bool "dawgdic"
 	depends on BR2_INSTALL_LIBSTDCPP
+	# std=c11
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
 	help
 	  dawgdic provides a library for building and accessing
 	  dictionaries implemented with directed acyclic word graphs
@@ -13,5 +15,5 @@ config BR2_PACKAGE_DAWGDIC
 
 	  https://github.com/stil/dawgdic
 
-comment "dawgdic needs a toolchain w/ C++"
-	depends on !BR2_INSTALL_LIBSTDCPP
+comment "dawgdic needs a toolchain w/ C++, gcc >= 4.7"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_7