Recategorize some logging, in preparation for what's to come.

Core/HLE/sceKernelModule.cpp

@@ -1799,7 +1799,7 @@ void __KernelGPUReplay() {
 	// Special ABI: s0 and s1 are the "args".  Not null terminated.
 	const char *filenamep = Memory::GetCharPointer(currentMIPS->r[MIPS_REG_S1]);
 	if (!filenamep) {
-		ERROR_LOG(SYSTEM, "Failed to load dump filename");
+		ERROR_LOG(G3D, "Failed to load dump filename");
 		Core_Stop();
 		return;
 	}