Use verbose make test on travis

"Failed test 42" is rarely useful, especially when you can't repro locally.
Verbose tests will give more info on how the failing test fails

.travis.yml

@@ -23,7 +23,7 @@ addons:
 script:
     - if [[ $TRAVIS_OS_NAME != osx && $RAKUDO_OPTIONS =~ jvm ]]; then sudo -E apt-get install oracle-java8-installer; fi
     - perl Configure.pl $RAKUDO_OPTIONS --moar-option=--cc=$(command -v gcc-6 >/dev/null 2>&1; if [ $? -eq 1 ]; then printf "gcc"; else printf "gcc-6"; fi)
-    - "make test"
+    - (cd ~/build/rakudo/rakudo/ && prove -e ~/build/rakudo/rakudo/install/bin/perl6 -lr t)
     - "make install"
 
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