Give Travis latest build tools

README.md

@@ -126,7 +126,7 @@ Install Android SDK:
     sudo apt-get install lib32stdc++6 lib32z1
     wget http://dl.google.com/android/android-sdk_r23.0.2-linux.tgz
     tar -xzf ./android-sdk_r23.0.2-linux.tgz
-    ./android-sdk-linux/tools/android update sdk -u -a -t tools,platform-tools,build-tools-21.1.0,android-19,android-21,extra-android-m2repository,extra-google-m2repository
+    ./android-sdk-linux/tools/android update sdk -u -a -t tools,platform-tools,build-tools-21.1.1,android-21,extra-android-m2repository,extra-google-m2repository
     export ANDROID_HOME="/dir/to/android-sdk-linux"
 
 Run: 

android/java/app/build.gradle

@@ -6,7 +6,7 @@ android {
 
     defaultConfig {
         applicationId "com.mapbox.mapboxgl.app"
-        minSdkVersion 19
+        minSdkVersion 18
         targetSdkVersion 21
     }
 

android/java/lib/build.gradle

@@ -6,7 +6,7 @@ android {
 
     defaultConfig {
         applicationId "com.mapbox.mapboxgl.lib"
-        minSdkVersion 19
+        minSdkVersion 18
         targetSdkVersion 21
 
         ndk {

scripts/travis_before_install.sh

@@ -49,7 +49,7 @@ if [[ "${MASON_PLATFORM}" == "android" ]]; then
         echo "debug: installing SDK"
         #mapbox_time "installing SDK" \
         sudo apt-get -y install lib32stdc++6 lib32z1
-        echo y | ./android-sdk/tools/android update sdk -u -a -t tools,platform-tools,build-tools-21.1.0,android-19,android-21,extra-android-m2repository,extra-google-m2repository
+        echo y | ./android-sdk/tools/android update sdk -u -a -t tools,platform-tools,build-tools-21.1.1,android-21,extra-android-m2repository,extra-google-m2repository
     
 elif [[ ${TRAVIS_OS_NAME} == "osx" ]]; then