Merge pull request #574 from iamqizhao/master

Skip all goroutines in C code for the leak detection

test/end2end_test.go

@@ -1807,7 +1807,8 @@ func interestingGoroutines() (gs []string) {
 			strings.Contains(stack, "runtime.MHeap_Scavenger") ||
 			strings.Contains(stack, "signal.signal_recv") ||
 			strings.Contains(stack, "sigterm.handler") ||
-			strings.Contains(stack, "created by mgc") {
+			strings.Contains(stack, "runtime_mcall") ||
+			strings.Contains(stack, "goroutine in C code") {
 			continue
 		}
 		gs = append(gs, g)