fix travis build (#2575)

* fix travis build

* rename dir

travis-compile.sh

@@ -4,11 +4,11 @@ set -e
 
 ./servatrice/check_schema_version.sh
 
-mkdir build
+mkdir -p build
 cd build
 prefix=""
 if [[ $TRAVIS_OS_NAME == "osx" ]]; then
-  prefix="-DCMAKE_PREFIX_PATH=$(echo /usr/local/Cellar/qt5/5.*/)"
+  prefix="-DCMAKE_PREFIX_PATH=$(echo /usr/local/Cellar/qt/5.*/)"
 fi
 if [[ $TRAVIS_OS_NAME == "linux" ]]; then
   prefix="-DCMAKE_PREFIX_PATH=$(echo /opt/qt5*/lib/cmake/)"

travis-dependencies.sh

@@ -2,7 +2,8 @@
 
 if [[ $TRAVIS_OS_NAME == "osx" ]] ; then
   brew update > /dev/null
-  brew install qt5 protobuf > /dev/null
+  brew install --force qt
+  brew install protobuf
 else
   # common prerequisites
   sudo add-apt-repository -y ppa:smspillaz/cmake-master