Travis: build libretro android

.travis.sh

@@ -83,9 +83,13 @@ travis_script() {
             export NDK_TOOLCHAIN_VERSION=clang
         fi
 
-        pushd android
-        ./ab.sh -j2 APP_ABI=$APP_ABI
-        popd
+        if [ "$LIBRETRO" = "TRUE" ]; then
+            ./b.sh --libretro_android ppsspp_libretro
+        else
+            pushd android
+            ./ab.sh -j2 APP_ABI=$APP_ABI
+            popd
+        fi
 
 #        When we can get this to work...
 #        chmod +x gradlew

.travis.yml

@@ -70,6 +70,11 @@ matrix:
       compiler: "gcc"
       env: PPSSPP_BUILD_TYPE=Android
            APP_ABI=x86_64
+    - os: linux
+      compiler: "gcc"
+      env: PPSSPP_BUILD_TYPE=Android
+           APP_ABI=arm64-v8a
+           LIBRETRO=TRUE
     - os: linux
       compiler: "clang"
       env: PPSSPP_BUILD_TYPE=Linux

b.sh

@@ -41,6 +41,9 @@ do
 		--libretro) echo "Build Libretro core"
 			CMAKE_ARGS="-DLIBRETRO=ON ${CMAKE_ARGS}"
 			;;
+		--libretro_android) echo "Build Libretro Android core"
+		        CMAKE_ARGS="-DLIBRETRO=ON -DCMAKE_TOOLCHAIN_FILE=${NDK}/build/cmake/android.toolchain.cmake -DANDROID_ABI=${APP_ABI} ${CMAKE_ARGS}"
+			;;
 		--unittest) echo "Build unittest"
 			CMAKE_ARGS="-DUNITTEST=ON ${CMAKE_ARGS}"
 			;;