package/webkitgtk: fix GCC version in comment

Commit 4c7fcbbe75de5c535e8d5dd7182900b6d09e2b03 should have set it to GCC 8.

Signed-off-by: Thomas Devoogdt <thomas@devoogdt.com>
Reviewed-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit fd5afab7b643997e89e1804de686a3935f8dd724)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/webkitgtk/Config.in

@@ -21,7 +21,7 @@ comment "webkitgtk needs libgtk3 and a toolchain w/ C++, wchar, threads, dynamic
 	depends on !BR2_BINFMT_FLAT
 	depends on !BR2_PACKAGE_LIBGTK3 || !BR2_INSTALL_LIBSTDCPP || \
 		!BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS || \
-		!BR2_TOOLCHAIN_GCC_AT_LEAST_7 || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_8 || \
 		!BR2_HOST_GCC_AT_LEAST_4_9
 	depends on BR2_USE_MMU