[fusl] clang-format fusl

fusl/src/signal/signal.c

 #include <signal.h>
 #include "syscall.h"
 #include "libc.h"
 
-int __sigaction(int, const struct sigaction *, struct sigaction *);
+int __sigaction(int, const struct sigaction*, struct sigaction*);
 
-void (*signal(int sig, void (*func)(int)))(int)
-{
-        struct sigaction sa_old, sa = { .sa_handler = func, .sa_flags = SA_RESTART };
-        if (__sigaction(sig, &sa, &sa_old) < 0)
-                return SIG_ERR;
-        return sa_old.sa_handler;
+void (*signal(int sig, void (*func)(int)))(int) {
+  struct sigaction sa_old, sa = {.sa_handler = func, .sa_flags = SA_RESTART};
+  if (__sigaction(sig, &sa, &sa_old) < 0)
+    return SIG_ERR;
+  return sa_old.sa_handler;
 }
 
 weak_alias(signal, bsd_signal);
 weak_alias(signal, __sysv_signal);