update kelftool to use new keystore system

Author: israpps

Makefile

@@ -348,4 +348,6 @@ include $(PS2SDK)/samples/Makefile.pref
 include $(PS2SDK)/samples/Makefile.eeglobal
 include embed.make
 
-KELFTOOL_DNAS = thirdparty/kelftool_dnasload.exe
+KELFTOOL_DNAS = thirdparty/kelftool_dnasload.exe
+update_kelftool:
+  wget -q "https://github.com/ps2homebrew/kelftool/releases/download/latest/kelftool.exe" -O $(KELFTOOL_DNAS)