Fix compile error on linux shared.

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index 31beaf91fe03c9390978f1693ab20fb60e8059c7..94e32707e1c8cf70ba05002ff01c3eaf12bd3a1d 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -1485,12 +1485,14 @@ int Shell::Main(int argc, char* argv[]) {
     }
     printf("======== Full Deoptimization =======\n");
     Testing::DeoptimizeAll();
+#if !defined(V8_SHARED)
   } else if (i::FLAG_stress_runs > 0) {
     int stress_runs = i::FLAG_stress_runs;
     for (int i = 0; i < stress_runs && result == 0; i++) {
       printf("============ Run %d/%d ============\n", i + 1, stress_runs);
       result = RunMain(argc, argv);
     }
+#endif
   } else {
     result = RunMain(argc, argv);
   }