mpd: needs toolchain with C++14 support

Fixes:
http://autobuild.buildroot.net/results/3fe/3fe440c0b9d05acb44553a8f02f688570e06bca9/
http://autobuild.buildroot.net/results/9b9/9b9659ba30afde49912276fe7f9c282953a352ab/
http://autobuild.buildroot.net/results/208/208bb987f52b8ba65e3c6fc9b6e917dbd44c0fbd/

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/mpd/Config.in

@@ -4,7 +4,7 @@ menuconfig BR2_PACKAGE_MPD
 	depends on BR2_USE_WCHAR # libglib2, flac
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
 	depends on BR2_USE_MMU # libglib2
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++14
 	depends on BR2_TOOLCHAIN_HAS_ATOMIC
 	select BR2_PACKAGE_BOOST
 	select BR2_PACKAGE_LIBGLIB2
@@ -315,8 +315,8 @@ config BR2_PACKAGE_MPD_UPNP
 
 endif
 
-comment "mpd needs a toolchain w/ C++, threads, wchar, gcc >= 4.6"
+comment "mpd needs a toolchain w/ C++, threads, wchar, gcc >= 4.9"
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_ATOMIC
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR || \
-		!BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
+		!BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9