Ensure line endings for .bat are not modified

Closes gh-10039

.gitattributes

@@ -1,6 +1,9 @@
 # Normalize line endings to auto.
 * text auto
 
+# Ensure that line endings for DOS batch files are not modified.
+*.bat -text
+
 # Ensure the following are treated as binary.
 *.cer      binary
 *.graffle  binary