tcg: Make tb_cflags() usable from target-agnostic code

tcg: Make tb_cflags() usable from target-agnostic code

Currently tb_cflags() is defined in exec-all.h, which is not usable
from target-agnostic code. Move it to translation-block.h, which is.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20231212003837.64090-3-iii@linux.ibm.com>
Message-Id: <20240125054631.78867-3-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>