Scripts: add update_instcountci.sh script

This is helpful for devs working on FEXCore, I've been using this locally but it
might make sense to stick it in tree.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>

Scripts/update_instcountci.sh

@@ -0,0 +1,14 @@
+#! /bin/bash
+set -e
+
+# Make sure we actually build
+ninja
+
+# Run tests, ignoring the retval since there will be changes.
+ninja instcountci_tests || true
+
+# Now we can update.
+ninja instcountci_update_tests
+
+# Commit the result in bulk.
+git commit -sam "InstCountCI: Update"