ndk+ci: Upgrade to use CrystaX NDK 10.3.1 and a more recent version of Crypto++ library

This commit also fixes checks with Travis-CI that were effectively broken before.

Change-Id: Ibf9e54de47db00ed01534187a19a3d40e9dee84e
diff --git a/.jenkins.d/10-get-sdk.sh b/.jenkins.d/10-get-sdk.sh
old mode 100644
new mode 100755
index 4b801dd..fef1aaa
--- a/.jenkins.d/10-get-sdk.sh
+++ b/.jenkins.d/10-get-sdk.sh
@@ -2,25 +2,31 @@
 set -e
 set -x
 
-SDK_TOOLS_VERSION=24.0.2
+GRADLE_VERSION=2.10
+SDK_VERSION=24.4.1
 BUILD_TOOLS_VERSION=21.1.2
 COMPILE_SDK_VERSION=21
 
-export ANDROID_HOME=`pwd`/android-sdk-linux
-export PATH=${PATH}:${ANDROID_HOME}/tools:${ANDROID_HOME}/platform-tools
-export PATH=$PATH:`pwd`/gradle-2.9/bin
+SDK=android-sdk-linux
 
-if [ ! -d android-sdk-linux ]; then
-    wget -q http://dl.google.com/android/android-sdk_r24.0.2-linux.tgz
-    tar zxf android-sdk_r24.0.2-linux.tgz
-    rm android-sdk_r24.0.2-linux.tgz
+export ANDROID_HOME=`pwd`/$SDK
+export PATH=${PATH}:${ANDROID_HOME}/tools:${ANDROID_HOME}/platform-tools
+
+if [ ! -d $SDK ]; then
+    wget -nv http://dl.google.com/android/android-sdk_r$SDK_VERSION-linux.tgz
+    tar zxf android-sdk_r$SDK_VERSION-linux.tgz
+    rm android-sdk_r$SDK_VERSION-linux.tgz
 
     echo "y" | android update sdk --filter platform-tools,build-tools-$BUILD_TOOLS_VERSION,android-$COMPILE_SDK_VERSION,extra-android-support,extra-android-m2repository,extra-google-m2repository --no-ui --all --force
     echo "y" | android update sdk --filter "android-19" --no-ui --all --force
 fi
 
-wget -q https://services.gradle.org/distributions/gradle-2.9-bin.zip
-unzip gradle-2.9-bin.zip
-rm gradle-2.9-bin.zip
+if [ ! -d gradle-$GRADLE_VERSION ]; then
+    wget -nv https://services.gradle.org/distributions/gradle-$GRADLE_VERSION-bin.zip
+    unzip gradle-$GRADLE_VERSION-bin.zip
+    rm gradle-$GRADLE_VERSION-bin.zip
 
-echo sdk.dir=`pwd`/android-sdk-linux >> local.properties
+    ln -s `pwd`/gradle-$GRADLE_VERSION/bin/gradle gradle
+fi
+
+echo sdk.dir=`pwd`/$SDK >> local.properties