add static sanity check for human error of forgetting DataView endianness

test/check-endianness.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# A sanity check to prevent human error
+echo "if you see any output, this test has failed"
+
+grep -R setUint *.js test/ | grep -v false
+grep -R getUint *.js test/ | grep -v false