Enable correct license checks.

BUG=b/166638163
TEST=`repo upload`
RELEASE_NOTE=None

Change-Id: I380937baaa27a77ddf0d5c1924f0a8650cf6d56b
diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
index 92221ad..806b478 100644
--- a/PRESUBMIT.cfg
+++ b/PRESUBMIT.cfg
@@ -7,7 +7,8 @@
 manifest_check: true
 
 # On by default, but required for options below.
-cros_license_check: true
+cros_license_check: false
+cos_ebuild_license_header_check: true
 
 [Hook Overrides Options]
 # Ignore generated chromeos-config C files.