Removes an extra space incorrectly added to the before_install section

Signed-off-by: Otavio Rodolfo Piske <opiske@redhat.com>

.travis.yml

@@ -9,7 +9,7 @@ os:
   - osx
 
 before_install:
-    - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; brew install openssl ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; brew install openssl ; fi
 
 script:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then mkdir build.paho ; cd build.paho; cmake -DPAHO_WITH_SSL=TRUE -DPAHO_BUILD_DOCUMENTATION=FALSE -DPAHO_BUILD_SAMPLES=TRUE .. ; fi