travis macosx: fix Qt install, no cache...

.travis.yml

@@ -101,9 +101,9 @@ matrix:
     - env: "JOB=MacOSX"
       os: osx
       osx_image: xcode7.3
-      cache:
-        directories:
-          - /usr/local/Cellar
+      #cache:
+      #  directories:
+      #    - /usr/local/Cellar
       before_install:
         - openssl aes-256-cbc -K $encrypted_99b076488ab1_key -iv $encrypted_99b076488ab1_iv -in build/travis/resources/osuosl_nighlies_rsa.enc -out build/travis/resources/osuosl_nighlies_rsa -d
         - source build/travis/job_macos/before_install.sh

build/travis/job_macos/install.sh

@@ -39,11 +39,12 @@ if [[ "$QMAKE_VERSION" != "${QT_LONG_VERSION}" ]]; then
   echo "Downloading Qt"
   wget -c --no-check-certificate -nv https://download.qt.io/archive/qt/${QT_SHORT_VERSION}/${QT_LONG_VERSION}/${QT_INSTALLER_FILENAME}
   hdiutil mount ${QT_INSTALLER_FILENAME}
-
-  QT_INSTALLER_EXE=/Volumes/${QT_INSTALLER_ROOT}/${QT_INSTALLER_ROOT}.app/Contents/MacOS/${QT_INSTALLER_ROOT}
+  cp /Volumes/${QT_INSTALLER_ROOT}/${QT_INSTALLER_ROOT}.app $HOME/${QT_INSTALLER_ROOT}.app
+  QT_INSTALLER_EXE=$HOME/${QT_INSTALLER_ROOT}.app/Contents/MacOS/${QT_INSTALLER_ROOT}
 
   echo "Installing Qt"
   ./build/travis/job_macos/extract-qt-installer $QT_INSTALLER_EXE $QT_PATH
+  rm $HOME/${QT_INSTALLER_ROOT}.app
 else
   echo "Qt ${QT_LONG_VERSION} already installed"
 fi