Config: Sets debug build flags to " -O0 -g" instead of " -Og -g".

wscript

@@ -141,7 +141,7 @@ def configure(conf):
             if conf.env.CXX_NAME in ["clang", "llvm"]:
                 common_flags += " -fdiagnostics-color"
             if conf.options.debug_build:
-                opt_flags = " -Og -g"
+                opt_flags = " -O0 -g"
             else:
                 opt_flags = " -O3 -g"