cros_sdk: Fix typo in comment: s/ommited/omitted/

BUG=None
TEST=Eye halve a spelling chequer

Change-Id: Ia4e6691b36a14be6bfba4bcf6851259c0a11b5a9
Reviewed-on: https://gerrit.chromium.org/gerrit/45674
Commit-Queue: Josh Triplett <josh@joshtriplett.org>
Tested-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/cros_sdk.py b/scripts/cros_sdk.py
index 28a2f45..d241240 100644
--- a/scripts/cros_sdk.py
+++ b/scripts/cros_sdk.py
@@ -30,7 +30,7 @@
 ENTER_CHROOT = [os.path.join(constants.SOURCE_ROOT,
                              'src/scripts/sdk_lib/enter_chroot.sh')]
 
-# We need these tools to run. Very common tools (tar,..) are ommited.
+# We need these tools to run. Very common tools (tar,..) are omitted.
 NEEDED_TOOLS = ('curl', 'xz')