bsd-user/signal-common.h: Move signal functions prototypes to here

Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/bsd-user/signal-common.h b/bsd-user/signal-common.h
index 6207417..f9a9d1e 100644
--- a/bsd-user/signal-common.h
+++ b/bsd-user/signal-common.h
@@ -9,6 +9,12 @@
 #ifndef SIGNAL_COMMON_H
 #define SIGNAL_COMMON_H
 
+long do_rt_sigreturn(CPUArchState *env);
+abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
+long do_sigreturn(CPUArchState *env);
 void force_sig_fault(int sig, int code, abi_ulong addr);
+void process_pending_signals(CPUArchState *env);
+void queue_signal(CPUArchState *env, int sig, target_siginfo_t *info);
+void signal_init(void);
 
 #endif