Update .travis.yml

.travis.yml

@@ -1,14 +1,14 @@
 language: cpp
-#dist: trusty
-dist: xenial
+dist: trusty
+#dist: xenial
 branches:
   except:
     - latest-master
 
 before_install:
-  - export BUILD_PSP=YES
-  - export BUILD_ANDROID=YES
-  - export BUILD_Qt=YES
+  - export BUILD_PSP=NO
+  - export BUILD_ANDROID=NO
+  - export BUILD_Qt=NO
   - export BUILD_MAC=NO
 # Only building on Mac when not handling pull request
 # - if [ "$TRAVIS_PULL_REQUEST" ==  "false" ]; then