feat: updated engine version to 4.4-rc1

engine/modules/etcpak/SCsub

@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+from misc.utility.scons_hints import *
 
 Import("env")
 Import("env_modules")
@@ -11,6 +12,7 @@ thirdparty_obj = []
 
 thirdparty_dir = "#thirdparty/etcpak/"
 thirdparty_sources = [
+    "DecodeRGB.cpp",
     "Dither.cpp",
     "ProcessDxtc.cpp",
     "ProcessRGB.cpp",