Build both 32-bit and 64-bit binaries in standalone build.

This only works for Linux and OS X builds for now, until
Windows 64-bit compilation is fixed.

+ Remove --arch=<name> and --try-64 flags to android-configure.sh
  and android-rebuild.sh, since they're not needed anymore.

+ Remove the build of obsolete 'emulator-ui' and 'qemu-android-xxx'
  programs. We don't need them for now, and it's likely things will
  change a lot once we want to work on remote display / UI.

http://b.android.com/64805

Change-Id: I70be38d53650648f74323eb33284661a8bb77c88
4 files changed