Also check bin/ for tabs

Add bin/ to dib-lint basic script checks

Change-Id: I92849ab608a6c792d790f041dc7614278c274d30

bin/dib-lint

@@ -204,7 +204,7 @@ done
 
 echo "Checking indents..."
 
-for i in $(find elements -type f -and -name '*.rst' -or -type f -executable); do
+for i in $(find bin elements -type f -and -name '*.rst' -or -type f -executable); do
     # Check for tab indentation
     if ! excluded tabindent; then
         if grep -q $'^ *\t' ${i}; then