.travis.yml: give make update exit code meaning again

Reviewed-by: NTim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6461)

.travis.yml

@@ -186,8 +186,8 @@ script:
           echo -e '+\057 MAKE UPDATE OK';
       else
           echo -e '+\057 MAKE UPDATE FAILED'; false;
-      fi;
-      git diff --exit-code
+      fi
+    - git diff --exit-code
     - if [ -n "$CHECKDOCS" ]; then
           if $make doc-nits; then
               echo -e '+\057\057 MAKE DOC-NITS OK';