avoid breaking scripts with git autocrlf

When checking out with core.autocrlf enabled on Windows, the scripts in
files/ would have their line endings converted to CRLF, which prevents
them from running on webOS. This commit should prevent the line endings
of these files from being changed without affecting anything else.

.gitattributes

@@ -0,0 +1,4 @@
+* text=auto
+
+# these need to be LF to run on webOS
+/files/* text eol=lf