test android target on travis/linux

.travis.yml

@@ -5,7 +5,7 @@ matrix:
     - os: linux
   include:
     - os: linux
-      env: BUILDTYPE=Release JOBS=16
+      env: BUILDTYPE=Release JOBS=16 MASON_PLATFORM=android
       compiler: clang
     - os: linux
       env: BUILDTYPE=Debug JOBS=16
@@ -25,6 +25,7 @@ env:
    - LD_LIBRARY_PATH: '/usr/local/lib'
 
 before_install:
+- if [ "${MASON_PLATFORM}" = "android" ]; then MASON_PLATFORM= ~/.mason/mason install 7z 9.20; export PATH=$(MASON_PLATFORM= ~/.mason/mason prefix 7z 9.20)/bin:${PATH}; wget http://dl.google.com/android/ndk/android-ndk-r10c-linux-x86_64.bin; chmod a+x ./android-ndk-r10c-linux-x86_64.bin; 7za x ./android-ndk-r10c-linux-x86_64.bin > /dev/null; export ANDROID_NDK_PATH=$(pwd)/android-ndk-r10c; ls -l;ls -l $ANDROID_NDK_PATH; fi;
 - source ./scripts/local_mason.sh
 - source ./scripts/travis_helper.sh
 - source ./scripts/flags.sh

scripts/travis_script.sh

@@ -11,7 +11,7 @@ if [[ ${TRAVIS_OS_NAME} == "linux" ]]; then
     # build & test Linux
     #
     mapbox_time "compile_program" \
-    make linux -j$JOBS BUILDTYPE=${BUILDTYPE}
+    make android -j$JOBS BUILDTYPE=${BUILDTYPE}
 
     mapbox_time "compile_tests" \
     make test -j$JOBS BUILDTYPE=${BUILDTYPE}