Provide a time for NowIncludingSuspendMs

--- thunderbird-144.0.1/mozglue/misc/Now.cpp.~1~	2025-10-15 23:20:31.000000000 -0400
+++ thunderbird-144.0.1/mozglue/misc/Now.cpp	2025-10-19 23:01:23.636220624 -0400
@@ -93,7 +93,20 @@
 
 Maybe<uint64_t> NowIncludingSuspendMs() {
 #  ifndef CLOCK_BOOTTIME
+
+#ifdef XP_SOLARIS
+// Illumos does not suspend.  No need for BOOTTIME (which is not in Illumos)
+  struct timespec ts = {0};
+
+  if (clock_gettime(CLOCK_MONOTONIC, &ts)) {
+    return Nothing();
+  }
+  return Some(TimespecToMilliseconds(ts));
+
+#else // XP_SOLARIS
   return Nothing();
+#endif 
+
 #  else
   struct timespec ts = {0};