include app's lib/ in LD_LIBRARY_PATH so pinentry can find its lib
document how to add LD_LIBRARY_PATH to other apps, for gpg cmd line tools
automatically include test files when including files in assets/
if building on a 64-bit platform, use 64-bit NDK introduced in r8e

You can force a 64-bit machine to use the 32-bit NDK with the NDK_PROCESSOR
variable to make:

make NDK_PROCESSOR=x86