libuv: Restore support for macOS 10.10

Upstream libuv no longer supports this version.

Utilities/cmlibuv/src/unix/darwin.c

@@ -165,6 +165,7 @@ void uv_loadavg(double avg[3]) {
 
 int uv_resident_set_memory(size_t* rss) {
   mach_msg_type_number_t count;
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 101100
   task_vm_info_data_t info;
   kern_return_t err;
 
@@ -182,6 +183,22 @@ int uv_resident_set_memory(size_t* rss) {
    */
   assert(err == KERN_SUCCESS);
   *rss = info.phys_footprint;
+#else
+  task_basic_info_data_t info;
+  kern_return_t err;
+
+  count = TASK_BASIC_INFO_COUNT;
+  err = task_info(mach_task_self(),
+                  TASK_BASIC_INFO,
+                  (task_info_t) &info,
+                  &count);
+  (void) &err;
+  /* task_info(TASK_BASIC_INFO) cannot really fail. Anything other than
+   * KERN_SUCCESS implies a libuv bug.
+   */
+  assert(err == KERN_SUCCESS);
+  *rss = info.resident_size;
+#endif
 
   return 0;
 }

Utilities/cmlibuv/src/unix/kqueue.c

@@ -237,7 +237,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     }
 
    if ((w->events & UV__POLLPRI) == 0 && (w->pevents & UV__POLLPRI) != 0) {
-#ifdef __APPLE__
+#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED >= 101300
       /*
        * Use EVFILT_EXCEPT+ NOTE_OOB for macOS since it defines this flag.
        * FreeBSD does not.
@@ -386,7 +386,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
           revents |= UV__POLLRDHUP;
       }
 
-#ifdef __APPLE__
+#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED >= 101300
       /* Match EVFILT_EXCEPT used above for macOS. */
       if (ev->filter == EVFILT_EXCEPT) {
 #else