WIP of assimp integration.

Engine/lib/assimp/scripts/android_crosscompile/make_android.bat

@@ -0,0 +1,28 @@
+@echo off
+
+set ASSIMP_PATH=D:\projects\asset-importer-lib\assimp
+set CMAKE_PATH="C:\Program Files\CMake\bin\cmake.exe"
+set ANDROID_NDK_PATH=C:\Users\kimkulling\AppData\Local\Android\Sdk\ndk-bundle
+set ANDROID_CMAKE_PATH=contrib\android-cmake
+
+pushd %ASSIMP_PATH%
+
+rmdir /s /q build
+mkdir build
+cd build
+
+%CMAKE_PATH% .. ^
+  -G"MinGW Makefiles" ^
+  -DCMAKE_BUILD_TYPE=Release ^
+  -DCMAKE_TOOLCHAIN_FILE=%ANDROID_CMAKE_PATH%\android.toolchain.cmake ^
+  -DCMAKE_MAKE_PROGRAM=%ANDROID_NDK_PATH%\prebuilt\windows-x86_64\bin\make.exe ^
+  -DANDROID_NDK=%ANDROID_NDK_PATH% ^
+  -DANDROID_NATIVE_API_LEVEL=android-9 ^
+  -DASSIMP_ANDROID_JNIIOSYSTEM=ON ^
+  -DANDROID_ABI=arm64-v8a ^
+  -DASSIMP_BUILD_ZLIB=ON ^
+  -DASSIMP_BUILD_TESTS=OFF
+
+%CMAKE_PATH% --build .
+
+popd