compile.sh: handle arguments in one place
build: fix invalid env.sh when building differents archs
build: export RELEASE too
build: fix java dependencies
compile./sh: also boostrap/configure with --jni
build: add multiple ABI build

ANDROID_ABI can now contains more than one ABI.

For example:
ANDROID_ABI="armeabi-v7a x86" ./compile.sh
will build an apk containing armeabi-v7a and x86 libs.