Android build

Some patches are necessary :

Basekit :

In third-party/basekit/Makefile add :

CFLAGS += -I/home/efyx/dev/nidium/Nidium.android/third-party/android-sdk/ndk-bundle/platforms/android-19/arch-arm/usr/include/

FFmpeg : JNI not found, comment :

#enabled jni               && { [ $target_os = "android" ] && check_header jni.h && enabled pthreads &&
#                               check_lib "dlfcn.h" dlopen -ldl || die "ERROR: jni not found"; }