Include 64-bit libraries in releases about librtmp-client-for-android

[ojw28]

Note: You could potentially release both 32bit only and 32+64bit modules, if you want the option of keeping the size small for applications for whom the existing release works correctly.

[mekya]

After resolving #30 and #31, I can publish a new version for 32bit only and 32+64bit modules.

[mekya]

Yeah you are right, when do you need to get this issue done? Is it urgent?

[ojw28]

We're looking at adding an RTMP extension to ExoPlayer that has a dependency on this project (google/ExoPlayer#2503). It's not urgent other than we have developers who want (and will be happy to get) such an extension :).

I think we'd want this issue and also #30 / #31 / #32 fixed before we go ahead and commit, so from our perspective we'd rather see a release that takes a bit longer and fixes all four than a quick release that fixes this issue only. Lack of error propagation from read(), as well as read() being able to return 0, are particularly problematic.