ARM: static DR should *not* emulate in mangle_reads_thread_register()
Statically-linked-into-the-app DR has the native app value in the thread register, so it should not mangle reads and writes of that register. The code today does mangle it.
Statically-linked-into-the-app DR has the native app value in the thread register, so it should not mangle reads and writes of that register. The code today does mangle it.