Fixed syntax error

.travis.yml

@@ -135,12 +135,12 @@ before_install:
   - if [[ "${TRAVIS_CPU_ARCH}" == "ppc64le" || "${TRAVIS_CPU_ARCH}" == "arm64" ]]; then
       # The cmake version installed by apt on these architectures is very old,
       # so build a more recent version from source.
-      wget https://github.com/Kitware/CMake/releases/download/v3.17.1/cmake-3.17.1.tar.gz
-      tar xf cmake-3.17.1.tar.gz
-      cd cmake-3.17.1
-      ./bootstrap
-      make
-      sudo make install
+      wget https://github.com/Kitware/CMake/releases/download/v3.17.1/cmake-3.17.1.tar.gz;
+      tar xf cmake-3.17.1.tar.gz;
+      cd cmake-3.17.1;
+      ./bootstrap;
+      make;
+      sudo make install;
     fi
   #- if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
   #    CMAKE_URL="http://cmake.org/files/v3.7/cmake-3.7.2-Linux-x86_64.tar.gz";