Switch travis CI to xenial (cocos2d#19207)

* Switch travis CI to xenial

* Remove language: android

* Set language: cpp

* Fix java problem

* Update sdkmanager

* Fix sdkmanger

* next sdkmanager fix

* Remove xenial from android

* revert to sdk-tools-{system}-3859397

* Remove linux cmake install

* Update before-install.sh

* Update .travis.yml

Author: crazyhappygame

.travis.yml

@@ -2,6 +2,7 @@ matrix:
   include:
     # linux
     - os: linux
+      dist: xenial
       env: 
         - BUILD_TARGET=linux 
         - GEN_BINDING_AND_COCOSFILE=true
@@ -61,9 +62,10 @@ matrix:
       sudo: required
     - os: linux
       env: BUILD_TARGET=android_cocos_new_test
-      language: cpp
+      language: android
       sudo: required
     - os: linux
+      dist: xenial
       env: BUILD_TARGET=linux_cocos_new_test
       language: cpp
       sudo: required

tools/travis-scripts/before-install.sh

@@ -28,33 +28,6 @@ function install_linux_environment()
     pushd $HOME/bin
 
     echo "GCC version: `gcc --version`"
-    # install new version cmake
-    CMAKE_VERSION="3.7.2"
-    CMAKE_DOWNLOAD_URL="https://cmake.org/files/v3.7/cmake-${CMAKE_VERSION}.tar.gz"
-    echo "Download ${CMAKE_DOWNLOAD_URL}"
-    ${CURL} -O ${CMAKE_DOWNLOAD_URL}
-    tar -zxf "cmake-${CMAKE_VERSION}.tar.gz"
-    cd "cmake-${CMAKE_VERSION}"
-    ./configure > /dev/null
-    make -j2 > /dev/null
-    sudo make install > /dev/null
-    echo "CMake Version: `cmake --version`"
-    cd ..
-
-    # install new version binutils
-    BINUTILS_VERSION="2.27"
-    BINUTILS_URL="http://ftp.gnu.org/gnu/binutils/binutils-${BINUTILS_VERSION}.tar.gz"
-    echo "Download ${BINUTILS_URL}"
-    ${CURL} -O ${BINUTILS_URL}
-    tar -zxf "binutils-${BINUTILS_VERSION}.tar.gz"
-    cd "binutils-${BINUTILS_VERSION}"
-    ./configure > /dev/null
-    make -j2 > /dev/null
-    sudo make install > /dev/null
-    echo "ld Version: `ld --version`"
-    echo "which ld: `which ld`"
-    sudo rm /usr/bin/ld
-    popd
     echo "Installing linux dependence packages ..."
     echo -e "y" | bash $COCOS2DX_ROOT/build/install-deps-linux.sh
     echo "Installing linux dependence packages finished!"