fix-build: a small problem while fixing conflicts

with the export of kill_process_tree function

Signed-off-by: Naveen M K <naveen@syrusdark.website>

winsup/cygwin/include/cygwin/signal.h

@@ -478,8 +478,8 @@ int siginterrupt (int, int);
 #ifdef __INSIDE_CYGWIN__
 extern const char *sys_sigabbrev[];
 extern const char *sys_siglist[];
-#elif __BSD_VISIBLE
 extern void kill_process_tree(pid_t pid, int sig);
+#elif __BSD_VISIBLE
 extern const char __declspec(dllimport) *sys_sigabbrev[];
 extern const char __declspec(dllimport) *sys_siglist[];
 extern void __declspec(dllimport) kill_process_tree(pid_t pid, int sig);