domoticz: depends on gcc >= 4.8

sleep_for is not always defined with gcc <= 4.7, see
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52680

To fix this issue, add a dependency to gcc >= 4.8

Fixes:
 - http://autobuild.buildroot.net/results/0dada8dd727f32a4500670f6620adb05943ed0b7

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/domoticz/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_DOMOTICZ
 	depends on BR2_USE_MMU # mosquitto
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # mosquitto
 	depends on !BR2_STATIC_LIBS # mosquitto
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # sleep_for
 	# pthread_condattr_setclock
 	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL
 	depends on BR2_INSTALL_LIBSTDCPP
@@ -27,10 +28,11 @@ config BR2_PACKAGE_DOMOTICZ
 
 	  http://domoticz.com
 
-comment "domoticz needs lua >= 5.2 and a toolchain w/ C++, NPTL, wchar, dynamic library"
+comment "domoticz needs lua >= 5.2 and a toolchain w/ C++, gcc >= 4.8, NPTL, wchar, dynamic library"
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	depends on !BR2_INSTALL_LIBSTDCPP || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 || \
 		!BR2_TOOLCHAIN_HAS_THREADS_NPTL || \
 		!BR2_USE_WCHAR || BR2_STATIC_LIBS || \
 		!(BR2_PACKAGE_LUA_5_2 || BR2_PACKAGE_LUA_5_3)