Here are the sources of the special libthread_db that will be statically
linked against our gdbserver binary. These are uses automatically by the
build-gdbserver.sh script.

THIS IS NOT AN IMPORT MODULE.

Applications don't need to link to libthread_db anyway, this library is
a small interface used by gdbserver to manage the list of threads on the
target process. Its API and ABI are not stable and may change in the
future.