support dynamorio_static on Android

Splitting from #975. The Android toolchain and loader are different enough that it is extra work to support dynamorio_static. I already had to spend time addressing two issues (our_environ from envp which is not passed by the Android loader, and the Android linker failing to export _USES_DR_VERSION_), and after that we have a crash:

```
255|root@flo:/data/local/tmp/build_android-debug-internal-32 # suite/tests/bin/api.static_noclient
pre-DR init
dlsym 0xb6c84004 _USES_DR_VERSION_ => 0xb6fd9000 0xb6fd9000
ver=0xb6fd9000 602

```

It's not worth the time to support it at this point. This issue covers adding support in the future.