Suppress default config change warnings

Author: bjorn3

scripts/setup_rust_fork.sh

@@ -23,7 +23,7 @@ git -c user.name=Dummy -c [email protected] -c commit.gpgSign=false \
     am ../patches/*-stdlib-*.patch
 
 cat > config.toml <<EOF
-change-id = 115898
+change-id = 999999
 
 [llvm]
 ninja = false