added script for checking token sanity

certora/scripts/sanityTokens.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+make -C certora munged
+
+for f in certora/harnesses/{ERC20Votes,ERC20Wrapper,ERC20Permit}Harness.sol
+do
+    echo "Processing $f"
+    file=$(basename $f)
+    echo ${file%.*}
+    certoraRun certora/harnesses/$file \
+        --verify ${file%.*}:certora/specs/sanity.spec "$@" \
+        --solc solc8.2 --staging \
+        --optimistic_loop \
+        --msg "checking sanity on ${file%.*}" \
+        --settings -copyLoopUnroll=4 \
+        --send_only
+done