libsigc: bump to version 2.6.2

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libsigc/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_LIBSIGC
 	bool "libsigc++"
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 # C++11
 	depends on BR2_INSTALL_LIBSTDCPP
 	help
 	  libsigc++ implements a typesafe callback system for standard C++.
@@ -9,5 +10,5 @@ config BR2_PACKAGE_LIBSIGC
 
 	  http://libsigc.sourceforge.net/
 
-comment "libsigc++ needs a toolchain w/ C++"
-	depends on !BR2_INSTALL_LIBSTDCPP
+comment "libsigc++ needs a toolchain w/ C++, gcc >= 4.7"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_7

package/libsigc/libsigc.hash

@@ -1,2 +1,2 @@
-# From http://ftp.gnome.org/pub/gnome/sources/libsigc++/2.2/libsigc++-2.2.11.sha256sum
-sha256	9834045f74f56752c2c6b3cdc195c30ab8314ad22dc8e626d6f67f940f1e4957	libsigc++-2.2.11.tar.xz
+# From http://ftp.gnome.org/pub/gnome/sources/libsigc++/2.6/libsigc++-2.6.2.sha256sum
+sha256	fdace7134c31de792c17570f9049ca0657909b28c4c70ec4882f91a03de54437	libsigc++-2.6.2.tar.xz

package/libsigc/libsigc.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-LIBSIGC_VERSION_MAJOR = 2.2
-LIBSIGC_VERSION = $(LIBSIGC_VERSION_MAJOR).11
+LIBSIGC_VERSION_MAJOR = 2.6
+LIBSIGC_VERSION = $(LIBSIGC_VERSION_MAJOR).2
 LIBSIGC_SOURCE = libsigc++-$(LIBSIGC_VERSION).tar.xz
 LIBSIGC_SITE = http://ftp.gnome.org/pub/GNOME/sources/libsigc++/$(LIBSIGC_VERSION_MAJOR)
 LIBSIGC_DEPENDENCIES = host-m4