log4cplus: needs gcc >= 4.8

log4cplus needs std::map::emplace

Fixes:
 - http://autobuild.buildroot.net/results/ef0d8d7fae835ff555202f6de320945226ec00bf

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/log4cplus/Config.in

@@ -3,7 +3,7 @@ config BR2_PACKAGE_LOG4CPLUS
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_USE_WCHAR
 	depends on BR2_TOOLCHAIN_HAS_THREADS
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 # C++11
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # C++11
 	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # std::future
 	help
 	  log4cplus is a simple to use C++ logging API providing
@@ -13,9 +13,9 @@ config BR2_PACKAGE_LOG4CPLUS
 
 	  http://sourceforge.net/projects/log4cplus
 
-comment "log4cplus needs a toolchain w/ C++, wchar, threads, gcc >= 4.7"
+comment "log4cplus needs a toolchain w/ C++, wchar, threads, gcc >= 4.8"
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR || \
-		!BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
+		!BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
 
 comment "log4cplus needs a toolchain not affected by GCC bug 64735"
 	depends on BR2_TOOLCHAIN_HAS_GCC_BUG_64735