linux-user: target: signal: Support TARGET_SS_AUTODISARM

Add definitions to pass building.

Signed-off-by: Chen Gang <chengang@emindsoft.com.cn>
Message-Id: <20201008043105.21058-1-chengang@emindsoft.com.cn>
[lv: added the definitions in linux-user/generic/signal.h too]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
6 files changed