package/ivi-homescreen: needs gcc >= 8

ivi-homescreen needs C++17 filesystem resulting in the following build
failure with gcc < 8 since its addition in commit
9d8497e79de3ced144877ba6ee38cc5b7181aaeb:

In file included from /home/buildroot/instance-0/output-1/build/ivi-homescreen-5ab78a19e95c88cc5d6b173ab1260a211e78cf0a/third_party/flutter/shell/platform/common/path_utils.cc:5:0:
/home/buildroot/instance-0/output-1/build/ivi-homescreen-5ab78a19e95c88cc5d6b173ab1260a211e78cf0a/third_party/./flutter/shell/platform/common/path_utils.h:8:10: fatal error: filesystem: No such file or directory
 #include <filesystem>
          ^~~~~~~~~~~~

Fixes: 9d8497e79de3ced144877ba6ee38cc5b7181aaeb
 - http://autobuild.buildroot.org/results/a5e88d5a4264a6165be31a99f1c123af53fa382e

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/ivi-homescreen/Config.in

@@ -3,7 +3,7 @@ menuconfig BR2_PACKAGE_IVI_HOMESCREEN
 	depends on BR2_PACKAGE_HOST_FLUTTER_SDK_BIN_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_FLUTTER_ENGINE_ARCH_SUPPORTS
 	depends on BR2_HOST_GCC_AT_LEAST_5 # flutter-engine
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_5 # flutter-engine
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_8 # C++17 filesystem
 	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # flutter-engine
 	depends on BR2_TOOLCHAIN_USES_GLIBC # flutter-engine
 	depends on BR2_INSTALL_LIBSTDCPP # flutter-engine
@@ -250,11 +250,11 @@ comment "OpenGL texture plugin needs an EGL backend"
 
 endif # BR2_PACKAGE_IVI_HOMESCREEN
 
-comment "ivi-homescreen needs a glibc toolchain w/ wchar, C++, gcc >= 5, dynamic library, host gcc >= 5"
+comment "ivi-homescreen needs a glibc toolchain w/ wchar, C++, gcc >= 8, dynamic library, host gcc >= 5"
 	depends on BR2_PACKAGE_HOST_FLUTTER_SDK_BIN_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_FLUTTER_ENGINE_ARCH_SUPPORTS
 	depends on !BR2_TOOLCHAIN_USES_GLIBC \
-		|| !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_5 \
+		|| !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_8 \
 		|| BR2_STATIC_LIBS || !BR2_USE_WCHAR \
 		|| !BR2_HOST_GCC_AT_LEAST_5