Rename os_setup_signal_handling() to os_setup_early_signal_handling()

Rename os_setup_signal_handling() to os_setup_early_signal_handling()

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Acked-by: Juan Quintela <quintela@redhat.com>
Acked-by: Richard Henderson <rth@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/os-posix.c b/os-posix.c
index 914a4d1..948f662 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -31,7 +31,7 @@
 #include "config-host.h"
 #include "sysemu.h"
 
-void os_setup_signal_handling(void)
+void os_setup_early_signal_handling(void)
 {
     struct sigaction act;
     sigfillset(&act.sa_mask);