Disable ICache emulation for some games

Specifically, 'Scooby-Doo! Mystery Mayhem', 'Scooby-Doo! Unmasked', 'Ed, Edd n Eddy: The Mis-Edventures', and the Wii version of 'Happy Feet'.

The JIT cache causes problems with emulated icache invalidation in these games, resulting in areas failing to load.

Data/Sys/GameSettings/G5D.ini

@@ -0,0 +1,17 @@
+# G5DE78, G5DP78 - Scooby-Doo! Unmasked
+
+[Core]
+# Values set here will override the main Dolphin settings.
+# The JIT cache causes problems with emulated icache invalidation in this game resulting in areas failing to load
+DisableICache = True
+# Disabling ICache causes issues with the GameCube Main Menu.
+HLE_BS2 = True
+
+[OnLoad]
+# Add memory patches to be loaded once on boot here.
+
+[OnFrame]
+# Add memory patches to be applied every frame here.
+
+[ActionReplay]
+# Add action replay cheats here.