Merge \\"Sanitizer build tweaks.\\" am: 24dc27e6

# sanitized static libraries. That's OK, because the executable

# always depends on the ASan runtime library, which defines these

# symbols.

ifneq ($(strip $(SANITIZE_TARGET)),)

ifneq ($(filter address thread,$(strip $(SANITIZE_TARGET))),)

  ifndef LOCAL_IS_HOST_MODULE

    ifeq ($(LOCAL_MODULE_CLASS),SHARED_LIBRARIES)

      ifeq ($(my_sanitize),)

        my_allow_undefined_symbols := true

      endif

    endif

    # Workaround for a bug in AddressSanitizer that breaks stack unwinding.

    # https://code.google.com/p/address-sanitizer/issues/detail?id=387

    # Revert when external/compiler-rt is updated past r236014.

    LOCAL_PACK_MODULE_RELOCATIONS := false

  endif

endif