fix make warnings in debug.c MacOS (#7805)

Co-authored-by: Oran Agra <oran@redislabs.com>
(cherry picked from commit 1b3b75208c243fe9e18f34c4fb5f0233c2dc5a7f)

src/debug.c

@@ -1510,7 +1510,7 @@ int memtest_test_linux_anonymous_maps(void) {
     closeDirectLogFiledes(fd);
     return errors;
 }
-#endif
+#endif /* HAVE_PROC_MAPS */
 
 static void killMainThread(void) {
     int err;
@@ -1527,7 +1527,7 @@ static void killMainThread(void) {
  * should be used only when it's critical to stop the threads for some reason.
  * Currently Redis does this only on crash (for instance on SIGSEGV) in order
  * to perform a fast memory check without other threads messing with memory. */
-static void killThreads(void) {
+void killThreads(void) {
     killMainThread();
     bioKillThreads();
     killIOThreads();

src/server.h

@@ -2467,6 +2467,7 @@ void mixDigest(unsigned char *digest, void *ptr, size_t len);
 void xorDigest(unsigned char *digest, void *ptr, size_t len);
 int populateCommandTableParseFlags(struct redisCommand *c, char *strflags);
 void killIOThreads(void);
+void killThreads(void);
 
 /* TLS stuff */
 void tlsInit(void);