Revert "restrict to armv7 for now"

This reverts commit 6f1912438d142f522cf2242fe5f1a36711b19b56.

There should be no need to restrict the libraries ARCHs
to specific versions (besides those that don't build).
I'm not sure why the previous commit was introduced,
but it was probably because of build problems. Anyways,
those should be fixed in the application using this library.