package/gerbera: needs gcc >= 8

std::filesystem is required since version 1.5.0:
https://github.com/gerbera/gerbera/issues/849

Fixes:
 - http://autobuild.buildroot.org/results/759c875ee8ab0447cd735c22f89fa127cb8c427c

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 70db2351da182b1317c45ecd03947af555d5a703)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gerbera/Config.in

@@ -3,7 +3,7 @@ config BR2_PACKAGE_GERBERA
 	depends on BR2_USE_MMU # fork()
 	depends on BR2_TOOLCHAIN_HAS_ATOMIC
 	depends on BR2_TOOLCHAIN_HAS_THREADS
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # C++17 optional
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_8 # C++17 filesystem
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_USE_WCHAR # fmt
 	select BR2_PACKAGE_FMT
@@ -22,8 +22,8 @@ config BR2_PACKAGE_GERBERA
 
 	  https://gerbera.io
 
-comment "gerbera needs a toolchain w/ C++, threads, wchar, gcc >= 7"
+comment "gerbera needs a toolchain w/ C++, threads, wchar, gcc >= 8"
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_ATOMIC
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS || \
-		!BR2_USE_WCHAR || !BR2_TOOLCHAIN_GCC_AT_LEAST_7
+		!BR2_USE_WCHAR || !BR2_TOOLCHAIN_GCC_AT_LEAST_8