8144487: PhaseIdealLoop::build_and_optimize() must restore major_progress flag if skip_loop_opts is true

Restore the major_progress flag before calling igvn.optimize().

Reviewed-by: kvn

hotspot/src/share/vm/opto/loopnode.cpp

@@ -2335,6 +2335,11 @@ void PhaseIdealLoop::build_and_optimize(bool do_split_ifs, bool skip_loop_opts)
 #endif
 
   if (skip_loop_opts) {
+    // restore major progress flag
+    for (int i = 0; i < old_progress; i++) {
+      C->set_major_progress();
+    }
+
     // Cleanup any modified bits
     _igvn.optimize();