Elm: add default touchpad config

It is initial config for Elm and ignore clicks when no finger is
present

BUG=chrome-os-partner:51310
TEST=`cros_workon --board=elm start chromeos-base/gestures-conf`
     `emerge-elm chromeos-base/gestures-conf`
      check cmt configuration in the build image
      use plastic ballpoint to test over touchpad and confirmed no click
      events are generated.

Change-Id: If0a50c1697da0c271d3670e30aff8995a774242a
Signed-off-by: paris_yeh <pyeh@google.com>
Reviewed-on: https://chromium-review.googlesource.com/352860
Commit-Ready: Paris Yeh <pyeh@chromium.org>
Tested-by: Paris Yeh <pyeh@chromium.org>
Reviewed-by: Charlie Mooney <charliemooney@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
diff --git a/50-touchpad-cmt-elm.conf b/50-touchpad-cmt-elm.conf
new file mode 100644
index 0000000..7b05191
--- /dev/null
+++ b/50-touchpad-cmt-elm.conf
@@ -0,0 +1,7 @@
+Section "InputClass"
+    Identifier      "touchpad elm elan"
+    MatchIsTouchpad "on"
+    MatchDevicePath "/dev/input/event*"
+    MatchProduct    "Elan"
+    Option          "Zero Finger Click Enable" "0"
+EndSection