Update travis file

.travis.yml

@@ -21,7 +21,7 @@ matrix:
 
     - os: linux
       arch: arm64
-      name: "Linux / GCC (Debug)"
+      name: "Linux / GCC / ARM (Debug)"
       before_install:
         - sudo apt-get remove cmake
         - wget https://cmake.org/files/v3.8/cmake-3.8.2.tar.gz
@@ -53,13 +53,16 @@ matrix:
 
     - os: linux
       arch: arm64
-      name: "Linux / GCC (Release)"
+      name: "Linux / GCC / ARM (Release)"
       before_install:
-        - sudo apt remove cmake
-        - sudo pip install scikit-build
-        - sudo pip install --upgrade pip
-        - sudo pip install cmake --upgrade
+        - sudo apt-get remove cmake
+        - wget https://cmake.org/files/v3.8/cmake-3.8.2.tar.gz
+        - tar xf cmake-3.8.2.tar.gz
+        - cd cmake-3.8.2
+        - ./configure
+        - sudo make install
         - cmake --version
+        - cd ../
       addons:
         apt:
           sources: