Add "-r runtimeco/mcuboot" to travis encrypt

Signed-off-by: Fabio Utzig <utzig@apache.org>
diff --git a/.travis.yml b/.travis.yml
index 707999e..badc73b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@
 
 env:
   global:
-  - secure: "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"
+  - secure: "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"
 
 before_install:
   - echo -n | openssl s_client -connect scan.coverity.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | sudo tee -a /etc/ssl/certs/ca-